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The Future Of Trees Is Liquid

Video vocabulary

clear

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US / klɪə(r) /

UK / klɪr /

A1
  • adjecitve
  • Empty; without anything in it or on it
  • Being certain and without doubt
  • Being without any streaks, spots, or cracks
  • Easy to understand; well-explained; obvious
  • adverb
  • Completely; entirely; through the whole of
  • Away from; free from
  • verb
  • To recover from or remove a problem
  • To get rid of the entire contents of
  • To give permission for something to happen
  • To make a place or surface empty by removing
  • To prove that someone is not guilty or to blame

curious

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US / ˈkjʊəriəs /

UK / ˈkjʊriəs /

A2
  • adjecitve
  • Wanting to know more about something
  • Attracting interest by being strange or unusual

location

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US / ləʊˈkeɪʃn /

UK / loʊˈkeɪʃn /

B1
  • noun
  • Particular position or area of place, event, etc.

cover

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US / 'kʌvə(r) /

UK / ˈkʌvɚ /

A1
  • noun
  • A different version of another song
  • Bed sheets; blankets
  • (Police or military) protection from attack
  • Amount of money to be paid in an insurance claim
  • Thing you put over something to close or hide it
  • Front and back part of a book or magazine
  • Shelter built to protect from the natural elements
  • verb
  • To record a different version of another song
  • To include as part of its area
  • To put something over something to hide it
  • To discuss a subject in a talk or meeting
  • To form a layer over something so it is hidden
  • To have sufficient funds to pay for something
  • To include something within an agreed limit
  • To report news on TV, radio or in a newspaper
  • (Police or military) to protect from attack
  • To travel a certain distance in a given time
  • To wrap something with something, such as a cloth

have

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US / həv /

UK / hæv /

A1
  • verb
  • To drink, smoke, eat or use something
  • To experience the effects of something
  • To organize an event, or join in an activity
  • To own, possess, or hold something
  • To cause to happen or produce a particular effect

part

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US / pɑ:t /

UK / pɑ:rt /

A1
  • adjecitve
  • To some degree; half; not fully
  • noun
  • Division of a book
  • Ratio of something, e.g. 3 of gin, 1 of tonic
  • A line in a person's hair, made with a comb
  • Character an actor plays on stage, movie, or TV
  • Some, but not all of a specific thing
  • Role in causing something to happen
  • verb
  • To make a line in a person's hair, by using a comb
  • To move two things apart creating a space
  • To leave someone, or to break off a relationship

six

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US / sɪks /

UK / sɪks /

A1
  • number
  • 6

without

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US / wɪˈðaʊt /

UK / wɪðˈaʊt, wɪθ- /

A1
  • preposition
  • Not with; not having

resistant

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US / rɪˈzɪstənt /

UK / rɪˈzɪstənt /

A2
  • adjecitve
  • Not affected by something
  • Being opposed to or wanting to prevent something

suburb

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US / ˈsʌbɜ:b /

UK / ˈsʌbɜ:rb /

B1
  • noun
  • Residential area on the outskirts of a city

away

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US / ə'weɪ /

UK / əˈwe /

A1
  • adjecitve
  • Not present
  • adverb
  • Disappear completely
  • Doing something with a lot of energy
  • Not here; far from here; in a different direction
  • To a different area, location

meter

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US / ˈmi:tə(r) /

UK / ˈmitɚ /

A1
  • noun
  • Unit of length equal to 100 cm or about 39 inches
  • Device for measuring things e.g. gas
  • Device to put money into to rent a parking place
  • Rhythm of a poem
  • verb
  • To measure water, etc. when it has to be paid for

spirulina

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US / /

UK / /

A1
  • noun
  • Filamentous cyanobacteria which form tangled masses in warm alkaline lakes in Africa and Central and

sidewalk

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US / ˈsaɪdwɔ:k /

UK / ˈsaɪdˌwɔk /

C2
  • noun
  • Paved area for pedestrians, usually beside a road

belgrade

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US / belˈɡreid /

UK / ˈbɛlˌɡred, -ˌɡrɑd, bɛlˈɡred /

A1
  • proper noun
  • The capital of Serbia, on the Danube River; population 1,119,000 (est. 2008).

bench

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US / bentʃ /

UK / bɛntʃ /

B1
  • noun
  • Part of the room in court where the judge sits
  • Long (wooden) seat 2 people often found in a park
  • Seating area for teams at a sports events
  • verb
  • To prevent a player from playing in a game

could

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US / kəd /

UK / kʊd /

A1
  • other
  • Past form of 'can' to mean have ability
  • Used to ask for something politely, or to offer

know

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US / nəʊ /

UK / noʊ /

A1
  • verb
  • To be familiar with a person or place, thing
  • To feel sure or be convinced about something
  • To discover or be aware of something
  • To be able to distinguish
  • To have knowledge of things

station

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US / 'steɪʃn /

UK / ˈsteʃən /

A1
  • noun
  • Building, area, place used for a specific reason
  • A person's place in society
  • Place where you can catch a train or a bus
  • Company that broadcasts radio or TV programs
  • verb
  • (Army) to be posted to a place to perform duties
  • To put a person in a certain place or position

tank

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US / tæŋk /

UK / tæŋk /

B1
  • noun
  • Container for holding liquid or gas
  • Military vehicle that can go over rough areas
  • verb
  • To fail completely or badly
  • To deliberately lose a game or contest

urban

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US / 'ɜ:bən /

UK / ˈɚbən /

B1
  • adjecitve
  • Concerning a city; located in a city

government

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US / ˈgʌvənmənt /

UK / ˈɡʌvənmənt /

A1
  • noun
  • Group of people and system that rule a nation

store

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US / stɔ:(r) /

UK / stɔr, stor /

A2
  • noun
  • Place where things are kept for future use
  • Place where you can go to buy things
  • verb
  • To put things in a place for later use

trunk

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US / trʌŋk /

UK / trʌŋk /

B2
  • noun
  • Long nose of an elephant
  • Trunks shorts worn for swimming
  • Strong box/chest/container, as for traveling
  • Main thick and woody stem of a tree

with

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US / wɪð /

UK / wɪð, wɪθ /

A1
  • preposition
  • As an employee of a certain company
  • Against something or someone
  • By using something as a means
  • Due to; because of
  • Including
  • Possessing as a feature
  • Related to
  • (Of the manner/attitude by which you do something)
  • Used to express that people or things are together

accord

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US / ə'kɔ:d /

UK / əˈkɔ:rd /

B1
  • noun
  • Agreement or harmony
  • An agreement or treaty between countries
  • verb
  • To be in harmony or agreement; consent
  • To give (someone) the respect due to them

curiosity

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US / ˌkjʊərɪ'ɒsətɪ /

UK / ˌkjʊriˈɑsɪti /

B1
  • noun
  • Something unusual and perhaps worthy of collecting
  • Eager desire to learn more about something

car

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US / kɑ:(r) /

UK / kɑr /

A1
  • noun
  • A vehicle with wheels and engine to carry people

low

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US / ləʊ /

UK / lo /

A1
  • adjecitve
  • Having a small quantity, supply, or amount
  • Being unhappy or unpleasant in attitude
  • Not high; being near the ground, or bottom
  • (Of a voice, sound) being soft; quiet
  • noun
  • Situation of not having a lot of something

onto

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US / ˈɒntə /

UK / ˈɑnˌtu, -tə, ˈɔn- /

A1
  • preposition
  • Towards a certain direction/into a certain area

see

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US / si: /

UK / si /

A1
  • verb
  • To go on a date with someone
  • To predict whether something is, or will be true
  • To understand what someone says
  • To use your eyes to look at something
  • To visit a place often for sightseeing or pleasure
  • To visit or meet with someone
  • To find out by waiting or looking
  • To watch (a game, movie or TV show)

serve

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US / sɜ:v /

UK / sɚv /

A2
  • verb
  • To act in a particular position or office
  • To hit the first ball to an opponent in tennis etc.
  • To be used for a particular purpose
  • To give someone food or drinks
  • To give a person or group a service that is needed
  • To spend a particular amount of time in prison
  • To help customers find products and making sales
  • To give an official paper to appear in court

waste

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US / weɪst /

UK / west /

A2
  • noun
  • Materials left over after a process has finished
  • verb
  • To kill or severely harm someone
  • To use valuable things ineffectively

air

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US / eə(r) /

UK / er /

A1
  • noun
  • Mixture of gases around the earth that we breathe
  • A person's manner intended to impress others
  • verb
  • To expose to the outside, to dry or freshen
  • To broadcast a TV or radio show
  • To open a subject to discussion and debate

full

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US / fʊl /

UK / fʊl /

A1
  • adjecitve
  • Containing all the parts; complete
  • Containing or holding as much as possible
  • Having had enough food
  • adverb
  • In a direct manner; completely

pollute

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US / pə'lu:t /

UK / pəˈlut /

B1
  • verb
  • To make dirty, impure or harmful to environment
  • To make something negative

giant

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US / 'dʒaɪənt /

UK / ˈdʒaɪənt /

A2
  • adjecitve
  • Very large, or much bigger than other things
  • noun
  • Tall, large, and powerful human-like creatures
  • Very successful, powerful person or organization

park

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US / pɑ:k /

UK / pɑ:rk /

A1
  • noun
  • Person's name
  • Public green area in a town for exercise, relaxing
  • Field upon which a sport is played, e.g. baseball
  • verb
  • To stay still without moving
  • To leave your car, bike in a certain place

touchable

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US / 'tʌtʃəbl /

UK / 'tʌtʃəbəl /

A1
  • adjecitve
  • Able to touch

solution

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US / səˈlu:ʃn /

UK / səˈluʃən /

A2
  • noun
  • Mix of a liquid and a solid or a gas
  • Way to solve or deal with a problem

filter

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US / 'fɪltə(r) /

UK / ˈfɪltɚ /

B1
  • noun
  • Device to remove certain types of light, sound
  • Device to remove unwanted things from liquid, gas
  • verb
  • To remove certain types of light, sound
  • To remove unwanted substances from a liquid or gas

happy

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US / ˈhæpi /

UK / ˈhæpi /

A1
  • adjecitve
  • Feeling pleasure or joy; glad

misery

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US / 'mɪzərɪ /

UK / ˈmɪzəri /

B1
  • noun
  • Thing that causes unhappiness
  • Extreme suffering or unhappiness

play

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US / pleɪ /

UK / pleɪ /

A1
  • noun
  • Loose, free movement between two objects
  • Single action in a sports game
  • Performance in which people act in a theater
  • verb
  • To act as a character in a movie, or on stage
  • To perform music on an instrument
  • To use a device, e.g. a video game
  • To do something for enjoyment and fun
  • To do or perform a game or sport

ready

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US / 'redɪ /

UK / ˈrɛdi /

A1
  • adjecitve
  • Being likely or about to do something
  • Being willing to do a task
  • verb
  • To prepare something for use or action

this

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US / ðɪs /

UK / ðɪs /

A1
  • adjecitve
  • Used to indicate something already been discussed
  • Used to indicate something happening around now
  • adverb
  • An indication by a physical motion or gesture
  • A specific amount of
  • determiner
  • Person, thing, or idea near you
  • pronoun
  • Person, thing that has already been discussed

efficient

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US / ɪˈfɪʃnt /

UK / ɪˈfɪʃənt /

A2
  • adjecitve
  • Able to produce results without waste

forest

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US / 'fɒrɪst /

UK / ˈfɔrɪst, ˈfɑr- /

A1
  • noun
  • Large area with many trees

panel

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US / 'pænl /

UK / ˈpænəl /

A2
  • noun
  • Group who answer questions or give opinions
  • Flat surface with controls and switches
  • Flat, thin piece of material, often made of wood
  • verb
  • To cover a wall with thin pieces of wood

make

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US / meɪk /

UK / mek /

A1
  • noun
  • Product made by a particular company; brand
  • verb
  • To arrange or prepare something e.g. dinner
  • To get to (a place) on time
  • To gain the status of (teacher, lawyer, etc.)
  • To create something by putting things together
  • To earn a certain amount of money at a job
  • To cause or force a person to do something
  • To cause something to happen or be formed

path

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US / pɑ:θ /

UK / pæθ, pɑθ /

A2
  • noun
  • Method of living leading to a particular result
  • Track made with stones, by walking over the ground

pump

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US / pʌmp /

UK / pʌmp /

B1
  • noun
  • A device more moving liquids
  • Light woman's shoe
  • verb
  • To make liquid or gas flow in a particular direction
  • To make water/other liquid move using a machine
  • To move in or out, or up and down quickly
  • asking for information in an indirect way

able

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US / 'eɪbl /

UK / ˈebəl /

A2
  • adjecitve
  • Skilled; good at something
  • Having the ability to do something

lifespan

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US / ˈlaɪfspæn /

UK / ˈlaɪfspæn /

B2
  • noun
  • Length of time something is expected to last

into

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US / 'ɪntə /

UK / ˈɪntu /

A1
  • preposition
  • Moving or going inside something
  • In the same direction as; in the direction of
  • So as to become; taking the state of

love

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US / lʌv /

UK / lʌv /

A1
  • noun
  • Person's name
  • A very strong feeling of affection
  • The person you care very deeply about
  • Strong, deep emotional and sexual attraction
  • verb
  • To care for and like someone very strongly, deeply
  • To like doing very much; enjoy greatly
  • To feel a strong emotional and romantic attraction

other

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US / 'ʌðə(r) /

UK / ˈʌðər /

A1
  • adjecitve
  • A thing different from that mentioned
  • determiner
  • (Something) else; not the first (one)
  • pronoun
  • Being the one and only thing of that category

one

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US / wʌn /

UK / wʌn /

A1
  • pronoun
  • You; we; people in general; someone
  • The thing or person previously referred to
  • adjecitve
  • Used to refer to people generally
  • Being a strong example of (something mentioned)
  • number
  • Number 1

phone

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US / fəʊn /

UK / foʊn /

A2
  • noun
  • Machine used to talk to someone who is far away
  • verb
  • To talk to someone using a telephone

root

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US / ru:t /

UK / rut, rʊt /

A2
  • noun
  • Emotional connection with a place, history etc.
  • The origin or starting place of something
  • A number that is multiplied by itself
  • Part of plant growing underground, as to get water
  • Part of tooth, hair etc. from which the rest grows
  • Base part of a word to which affixes can be added
  • verb
  • To cause a plant to develop or grow roots
  • (Animals) to search for e.g. food in earth
  • To stop someone moving, as through fear

than

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US / ðən /

UK / ðən /

A1
  • conjunction
  • Used to compare two things that are not equal

climate

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US / ˈklaɪmət /

UK / ˈklaɪmɪt /

A2
  • noun
  • Typical weather conditions in a particular place

also

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US / 'ɔ:lsəʊ /

UK / ˈɔlso /

A1
  • adverb
  • In addition; too; in a similar way

kind

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US / kaɪnd /

UK / kaɪnd /

A1
  • adjecitve
  • In a caring and helpful manner
  • friendly and considerate
  • noun
  • One type of thing

hormone

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US / 'hɔ:məʊn /

UK / ˈhɔrˌmon /

B2
  • noun
  • Chemical produced by the body to control functions

how

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US / haʊ /

UK / haʊ /

A1
  • adjecitve
  • To what degree? in what amount?
  • adverb
  • (Used to explain the way to do something)
  • exclamation
  • For what purpose or reason?
  • (Used to ask someone or something's condition)

year

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US / jə: /

UK / jɪr /

A1
  • noun
  • Unit of time equal to 12 months or 365 or 366 days
  • Used to refer to the age of a person

you

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US / jʊ /

UK / ju /

A1
  • pronoun
  • Person someone is speaking or writing to
  • Person or people in general

wastewater

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US / 'weɪstwɔ:tə(r) /

UK / 'weɪstwɔ:tər /

A1
  • noun

circuit

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US / ˈsɜ:kɪt /

UK / ˈsɜ:rkɪt /

B1
  • noun
  • An area where cars race in a circle
  • Route for journey all the way around a place
  • Series of events moving from place to place
  • other
  • Electronic equipment consisting of switches
  • verb
  • To complete a journey all the way round an area

level

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US / 'levl /

UK / ˈlɛvəl /

A2
  • adjecitve
  • (Sports) equal to another
  • Being steady and determined (e.g. a voice)
  • noun
  • Specific height of something
  • Amount of ability you have compared to others
  • Floor or deck within a building
  • Tool used to determine if something is lying flat
  • verb
  • To aim a gun at someone
  • To destroy a building; flatten an area completely
  • To make things flat or even
  • To make a score equal to another, in sports

miserable

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US / ˈmɪzrəbl /

UK / ˈmɪzərəbəl, ˈmɪzrə- /

A2
  • adjecitve
  • Very unhappy

plant

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US / plɑ:nt /

UK / plænt /

A2
  • noun
  • Factory or a place where things are made
  • Living thing with leaves and roots growing in soil
  • verb
  • To firmly position something (in the ground)
  • To put seeds, flowers, trees in the ground

big

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US / bɪɡ /

UK / bɪɡ /

A1
  • adjecitve
  • Popular
  • Serious
  • Large

electricity

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US / ɪˌlekˈtrɪsəti /

UK / ɪlɛkˈtrɪsɪti,ˌilɛk- /

A2
  • noun
  • Energy generated positive and negative charges

graphic

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US / ˈgræfɪk /

UK / ˈɡræfɪk /

A2
  • adjecitve
  • Concerning things that are drawn
  • In clear detail, often when unpleasant in some way
  • noun
  • Picture or drawing used to show something clearly

lead

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US / li:d /

UK / lid /

A1
  • adjecitve
  • Being the main part in movies or plays
  • noun
  • Wire for electricity, computer, etc.; cable
  • Information that could help to solve a crime
  • Main part in a play or movie
  • Heavy, gray metal element
  • Rope used to tie something to stop it escaping
  • Act of being at the front in a race or game
  • verb
  • To show the way or guide others
  • To be at the front of a race or game
  • To travel in front of; go in advance of others

researcher

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US / rɪ'sɜ:tʃə(r) /

UK / rɪˈsətʃɚ /

A2
  • noun
  • Someone who works to find new facts and ideas

the

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US / ðə /

UK / ðə /

A1
  • article
  • Used to refer to something already mentioned
  • Used to show there is only one of something
  • determiner
  • Used to describe all of a family

compound

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US / 'kɒmpaʊnd /

UK / kɑmˈpaUnd /

B1
  • adjecitve
  • (Of a term) created by combining two or more words
  • noun
  • Series of buildings that are walled or fenced off
  • Chemical made up of several others
  • Closed walled area, as in a prison
  • Something formed by combining elements/parts
  • Term created by using two or more words together
  • verb
  • To pay interest on a loan including the interest
  • To make something from various parts or components
  • To make a mistake or problem worse

for

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US / fə(r) /

UK / fɔr,fə /

A1
  • preposition
  • Used to show the purpose, or need of something

immediate

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US / ɪˈmi:diət /

UK / ɪˈmidiɪt /

A2
  • adjecitve
  • Being the very next to or just after
  • Done without delay; straight away

infrastructure

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US / 'ɪnfrəstrʌktʃə(r) /

UK / ˈɪnfrəˌstrʌktʃɚ /

B1
  • noun
  • Basic necessary equipment for a country or region

player

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US / ˈpleɪə(r) /

UK / ˈpleɚ /

A1
  • noun
  • Machine that plays recorded material
  • Person who plays a musical instrument
  • Person who plays games on devices
  • Person who plays sports

short

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US / ʃɔ:t /

UK / ʃɔrt /

A1
  • adverb
  • Less than what is needed
  • Suddenly stopping what you are saying or doing
  • verb
  • (Of electric circuit) to spark because faulty
  • adjecitve
  • Measuring a small distance
  • Happening for a small amount of time
  • Unfriendly or rude

time

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US / taɪm /

UK / taɪm /

A1
  • noun
  • Speed at which music is played; tempo
  • Point as shown on a clock, e.g. 3 p.m
  • Number of hours, minutes needed to do something
  • Occasion when something happens
  • Period or occasion that something occurred
  • Period in history or the past
  • Something measured in minutes, hours, days, etc.
  • How long an event takes; duration
  • verb
  • To check speed at which music is performed
  • To choose a specific moment to do something
  • To measure how long an event takes, e.g. a race
  • To schedule something to occur at a specific moment

through

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US / θru: /

UK / θru /

A2
  • adjecitve
  • having finished using or doing something
  • adverb
  • From the beginning of something until the end
  • preposition
  • Over, in, across an entire thing or place
  • Allowing you to pass between, or to
  • By a particular way or process; by the use of

why

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US / waɪ /

UK / hwaɪ, waɪ /

A1
  • adverb
  • Question word to ask for a reason
  • exclamation
  • (Used to express surprise or approval)

grow

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US / ɡrəʊ /

UK / ɡro /

A1
  • verb
  • To get bigger and more mature; make plants do this
  • To improve; to develop better skills over time
  • To develop and become bigger or taller over time

specifically

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US / spəˈsɪfɪkli /

UK / spəˈsɪfɪkli /

A2
  • adverb
  • As regards a particular thing; closely related to
  • In particular

since

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US / sɪns /

UK / sɪns /

A1
  • adverb
  • At a point before the present time
  • conjunction
  • For this reason; because
  • preposition
  • From the time in the past that

start

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US / stɑ:t /

UK / stɑrt /

A1
  • noun
  • First time or place that a thing exists; beginning
  • First opportunity to achieve something, e.g. a job
  • Sudden action or movement because you are scared
  • other
  • Beginning of something in place or time
  • verb
  • To do, be or happen for the first time; begin
  • To turn something on

surplus

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US / ˈsɜ:pləs /

UK / ˈsɚpləs, -ˌplʌs /

B1
  • adjecitve
  • More than is needed or wanted
  • noun
  • Extra amount of something above what you need

soil

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US / sɔɪl /

UK / sɔɪl /

B1
  • noun
  • Conditions in which something develops
  • Mix of natural material in which plants grow
  • Land of a certain country
  • verb
  • To get or become dirty

yourself

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US / jɔ:ˈself /

UK / jʊrˈsɛlf, jɔr-, jor-, jə- /

A1
  • pronoun
  • Reflexive form of 'you', used for an emphasis

well

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US / wel /

UK / wɛl /

A1
  • adjecitve
  • Being in a fortunate, good condition or state
  • Healthy and in good condition
  • adverb
  • In an acceptable, proper, or successful manner
  • In a complete, total, or full manner
  • A great and considerable degree
  • In a successful way, in a good or satisfactory way
  • exclamation
  • Used to begin or continue a particular statement
  • Used to show you want to start saying something
  • Used to express that you are waiting for a reply
  • You say this to change the topic of a conversation
  • Used to indicate you are making a final remark
  • noun
  • Long deep hole in the ground to get water
  • verb
  • To cause your eyes to fill with tears

control

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US / kən'trəʊl /

UK / kənˈtrol /

A1
  • noun
  • A device designed to operate a machine
  • Participant in experiment that is left untouched
  • Act to dominate or command; make manageable
  • A law limiting the growth or spread of something
  • A place which overseas or manages e.g. a factory
  • verb
  • To direct or influence the behavior of something

light

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US / laɪt /

UK / laɪt /

A1
  • adjecitve
  • Being bright making it easy to see; not dark
  • Being pale and lacking darkness of color
  • Not heavy; weighing only a little
  • adverb
  • Carrying few bags when traveling
  • noun
  • A source of energy that makes a room or area bright
  • Way in which something or someone is understood
  • verb
  • To cause something to burn; put a burning match to
  • To provide a way to see ahead

nitrogen

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US / ˈnaɪtrədʒən /

UK / ˈnaɪtrədʒən /

B2
  • noun
  • A colorless chemical element without a smell

those

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US / ðəʊz /

UK / ðoz /

A1
  • determiner
  • The people or things we are talking about
  • pronoun
  • The objects far from the speaker

benefit

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US / 'benɪfɪt /

UK / ˈbɛnəfɪt /

A2
  • noun
  • Good result or effect, something advantageous
  • verb
  • To have a good effect or be helpful

edible

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US / ˈedəbl /

UK / ˈɛdəbəl /

B2
  • adjecitve
  • Being safe to eat

head

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US / hed /

UK / hɛd /

A1
  • noun
  • Counter for the number of cattle
  • Natural mental ability or intelligence
  • Leader or person with the greatest authority
  • Mind; mental ability; mental state
  • Side of a coin with a head on it
  • Top part of your body with eyes and a mouth
  • Starting point of something, e.g. a river
  • verb
  • To hit a ball with your head in a game
  • To be first or at the front or top (e.g. a list)
  • To travel or move toward a particular place; To go in a particular direction
  • To become the leader of something
  • To lead or be responsible for something

middle

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US / 'mɪdl /

UK / ˈmidl /

A1
  • adjecitve
  • Equal distance from extremes
  • noun
  • Place that is halfway between two things

organic

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US / ɔ:ˈgænɪk /

UK / ɔrˈɡænɪk /

B1
  • adjecitve
  • Developing naturally and without a set structure
  • Concerning food made with few or no chemicals
  • Concerning living things

never

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US / 'nevə(r) /

UK / ˈnɛvɚ /

A1
  • adverb
  • Not ever; not at any time

quality

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US / 'kwɒlətɪ /

UK / ˈkwɑlɪti /

A2
  • noun
  • Feature associated with someone or something
  • High level of worth or excellence

replace

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US / rɪ'pleɪs /

UK / rɪˈples /

A2
  • verb
  • To use instead of something else
  • To return an item to its original location

educational

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US / ˌedʒuˈkeɪʃənl /

UK / ˌɛdʒəˈkeʃənəl /

A2
  • adjecitve
  • Intended to teach or inform

just

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US / dʒʌst /

UK / dʒʌst /

A1
  • adjecitve
  • Proper or appropriate; as is deserved
  • Doing or being what is right or fair
  • Legally correct; having enough evidence
  • adverb
  • Almost; nearly
  • Exactly at the time of
  • Exactly (the same as, like)

microalgae

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US / ˈmaɪkə /

UK / 'maɪkə /

A1

heck

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US / hek /

UK / hɛk /

A1
  • exclamation
  • Expressing surprise, or frustration

talk

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US / tɔ:k /

UK / tɔk /

A1
  • noun
  • Style of speaking
  • Discussion between two countries
  • Giving information in front of people; lecture
  • Saying things or ideas to someone with words
  • verb
  • To make a formal speech about something
  • To say things or ideas to someone with words

tasty

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US / ˈteɪsti /

UK / ˈtesti /

A2
  • adjecitve
  • Good tasting; having a lot of flavor

awesome

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US / 'ɔ:səm /

UK / ˈɔsəm /

B2
  • adjecitve
  • Great; wonderful; stupendous

cold

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US / kəʊld /

UK / kold /

A1
  • adjecitve
  • Having a very low temperature
  • Being unfriendly or lacking emotion
  • noun
  • Illness of sneezing, coughing, and a sore throat

extremely

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US / ɪkˈstri:mli /

UK / ɪk'strimlɪ /

B1
  • adverb
  • In a way that is much more than usual or expected

heater

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US / 'hi:tə(r) /

UK / ˈhitɚ /

A2
  • noun
  • Device that heats water or supplies warmth

earth

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US / ɜ:θ /

UK / ɚθ /

A1
  • noun
  • Wire connecting an electrical device to the ground
  • The planet we live on
  • Soil in which we grow plants

much

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US / mʌtʃ /

UK / mʌtʃ /

A1
  • adjecitve
  • Very; to a high level or degree
  • adverb
  • A lot; large amount; a high degree of
  • Nearly; basically
  • On many occasions; often
  • noun
  • A large amount; a great quantity

system

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US / 'sɪstəm /

UK / ˈsɪstəm /

A1
  • adjecitve
  • Working in an organized, logical way
  • noun
  • Set of organized, planned ideas that work together

green

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US / gri:n /

UK / ɡrin /

A1
  • adjecitve
  • Color of young leaves
  • Covered with vegetation, e.g. grass
  • Concerned about protecting the environment
  • The color of young leaves
  • Lacking in experience/knowledge due to being young
  • Being not fully grown or ripe, as in fruit
  • noun
  • Large grassy area
  • used as a part of a name of a place (UK)

generate

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US / ˈdʒenəreɪt /

UK / ˈdʒɛnəˌret /

A2
  • verb
  • To create or be produced or bring into existence
  • To create electricity, heat, energy and power

street

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US / stri:t /

UK / strit /

A1
  • noun
  • Road in a city with buildings and places to walk

struggle

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US / 'strʌɡl /

UK / ˈstrʌɡəl /

A2
  • noun
  • Strong efforts made to do something difficult
  • verb
  • To try very hard to do something difficult

superfood

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US / ˈsuːpəfuːd /

UK / ˈsuːpərfuːd /

C2
  • noun
  • Very nutritious food

afterwards

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US / 'ɑ:ftəwədz /

UK / 'æftərwərdz /

A2
  • adverb
  • At a time after something else already mentioned

charge

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US / tʃɑ:dʒ /

UK / tʃɑrdʒ /

A2
  • noun
  • An attack by running quickly toward someone
  • A price for a service or goods
  • When a battery has a certain amount of electricity
  • Amount of money you pay for a service
  • verb
  • To run quickly toward someone to attack them
  • To ask for money as a price for a service or goods
  • To put electricity in a battery
  • To give responsibility to take care of or manage
  • To state that someone has committed a crime

cool

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US / ku:l /

UK / kul /

A1
  • adjecitve
  • Steady and calm when facing difficulties
  • Almost cold; not warm or hot
  • Smart or stylish in a way (young) people admire
  • Unfriendly in an indirect way; distant
  • verb
  • To make something decrease in temperature
  • (Of an emotion, etc.) to become less strongly felt

limited

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US / ˈlɪmɪtɪd /

UK / ˈlɪmɪtɪd /

B1
  • adjecitve
  • (Of a company) with a limit of financial liability
  • With restrictions; not broad in scope
  • verb
  • To stop or prevent an increase past a point

per

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US / pə(r) /

UK / pɚ /

A2
  • preposition
  • In the manner directed or suggested
  • For each; during each

soon

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US / su:n /

UK / sun /

A1
  • adverb
  • At a time not long from now

sound

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US / saʊnd /

UK / saʊnd /

A1
  • adjecitve
  • Sensible, dependable and reliable
  • Unbroken or undisturbed, as of sleep
  • Firm or solid in structure
  • Sane; not mentally ill
  • Clearly reasoned; involving sense, good judgment
  • noun
  • Unique quality that characterizes a style of music
  • Waves traveling in air or water that can be heard
  • verb
  • To seem or appear to be, from what was said
  • To say in a clear deliberate manner
  • To make a noise, e.g. to ring a bell

water

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US / 'wɔ:tə(r) /

UK / ˈwɔtɚ, ˈwɑtɚ /

A1
  • noun
  • Clear liquid that forms the seas, rivers and rain
  • Large area such as an ocean or sea
  • verb
  • (Of the eyes) to produce tears
  • (Mouth) to become wet at the thought of nice food
  • To pour liquids onto a plant to keep it alive

besides

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US / bɪˈsaɪdz /

UK / bɪˈsaɪdz /

A2
  • adverb
  • Other than or in addition to

same

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US / seɪm /

UK / sem /

A1
  • adjecitve
  • Being equal in quality and amount
  • Identical; not different
  • Not changing; constant

tiny

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US / 'taɪnɪ /

UK / ˈtaɪni /

A2
  • adjecitve
  • Very, very small

smooth

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US / smu:ð /

UK / smuð /

A2
  • adjecitve
  • Moving without stops and starts
  • Pleasant and flat to touch, not rough
  • Being free from problems or difficulties
  • verb
  • To make something rough feel flat, e.g. by ironing
  • To spread a substance over a surface

sneeze

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US / sni:z /

UK / sniz /

B1
  • noun
  • Act of air suddenly being forced out of nose/mouth
  • verb
  • To suddenly force air out of nose/mouth

food

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US / fu:d /

UK / fud /

A1
  • noun
  • What people and animals eat to live
  • Things taken in by plants to maintain life
  • A particular style or type of cooking, e.g. Asian

lamp

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US / læmp /

UK / læmp /

B1
  • noun
  • Device to produce light, using electricity/oil/gas

not

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US / nɒt /

UK / nɑt /

A1
  • adverb
  • Word indicating the negative
  • (Used to form the negative of verbs)

maybe

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US / ˈmeɪbi /

UK / ˈmebi /

A1
  • adverb
  • Possibly but not certainly; perhaps

quite

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US / kwaɪt /

UK / kwaɪt /

A1
  • adverb
  • Not very; fairly
  • Very; In a complete or total manner

ability

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US / ə'bɪlətɪ /

UK / əˈbɪlɪti /

A2
  • noun
  • The power, resources or skill to do something

but

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US / bət /

UK / bʌt,bət /

A1
  • conjunction
  • Used before you say something different, opposite

contaminant

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US / kənˈtæmɪnənt /

UK / kənˈtæmənənt /

C1
  • noun
  • Substance that pollutes or causes to be impure

especially

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US / ɪˈspeʃəli /

UK / ɛˈspɛʃəli, ɪˈspɛʃ- /

A1
  • adverb
  • More than usual; extremely

give

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US / ɡɪv /

UK / ɡɪv /

A1
  • noun
  • Degree of flexibility in something, a material
  • verb
  • To hand over or present something to someone
  • To cause someone to have or experience something

good

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US / ɡʊd /

UK / ɡʊd /

A1
  • adjecitve
  • Proper, appropriate or right
  • (Of an amount) enough; plenty
  • Excellent; high quality
  • Acting well or properly; of moral character
  • In a positive or happy emotional state
  • noun
  • Advantage or benefit

single

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US / 'sɪŋɡl /

UK / ˈsɪŋɡəl /

A1
  • adjecitve
  • Being one only, without others
  • Only; merely
  • Not married or in a relationship
  • noun
  • One run in cricket or a hit baseball
  • An individual song from a CD or album
  • Person who is not married or in a relationship

timetable

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US / ˈtaɪmteɪbl /

UK / ˈtaɪmˌtebəl /

B1
  • noun
  • Schedule listing the time that events will happen

blue

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US / blu: /

UK / blu /

A1
  • adjecitve
  • Color of the clear sky
  • Feeling sad or down

compare

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US / kəm'peə(r) /

UK / kəmˈpɛr /

A1
  • verb
  • To consider how similar and different things are

interested

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US / ˈɪntrəstɪd /

UK / ˈɪntrɪstɪd, -tərɪstɪd, -təˌrɛstɪd /

A1
  • adjecitve
  • Having had your attention taken; curious
  • verb
  • To make someone want to know about something
  • To persuade to do, become involved with something

really

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US / ˈri:əli /

UK / ˈriəˌli, ˈrili /

A1
  • adverb
  • Used to stress something that is said; definitely
  • In a true or accurate manner
  • Very

would

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US / wʊd /

UK / wʊd /

A1
  • other
  • Used to indicate something imagined
  • Used to ask or request something politely
  • Verb used to indicate possibility, request etc.
  • Used to indicate a preference
  • Used to indicate a reaction
  • Indicates something that occurred repeatedly
  • Used to indicate willingness or ability to do

breathe

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US / bri:ð /

UK / brið /

A2
  • verb
  • To move air into and out of your lungs
  • To say something very softly
  • To stop moving so one can rest

potentially

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US / pə'tenʃəlɪ /

UK / pəˈtɛnʃəlɪ /

B1
  • adverb
  • That could happen or become reality

photosynthesize

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US / ˌfəʊtəʊˈsɪnθəsaɪz /

UK / ˌfoʊtoʊˈsɪnθəsaɪz /

A1
  • verb
  • (Plants) to use the sun to make their food

friend

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US / frend /

UK / frɛnd /

A1
  • noun
  • Person who you like and enjoy being with

now

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US / naʊ /

UK / naʊ /

A1
  • adverb
  • At the present time or moment
  • Right away or in the next possible moment
  • Used to refer to something that just happened
  • Time between the present and a moment in the past
  • conjunction
  • Resulting from or because of something

protein

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US / ˈprəʊti:n /

UK / ˈprəʊˌtiːn /

B1
  • noun
  • Group of molecules made from amino acids

spacecraft

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US / ˈspeɪskrɑ:ft /

UK / ˈspeɪskræft /

C2
  • noun
  • Vehicle capable of traveling to outer space

urgent

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US / ˈɜ:dʒənt /

UK / ˈɜ:rdʒənt /

A2
  • adjecitve
  • Very important and needing immediate attention
  • That needs to be done quickly

grass

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US / grɑ:s /

UK / græs /

A2
  • noun
  • Slang name for marijuana
  • Plants with narrow green leaves, grown on lawns
  • verb
  • To betray someone
  • To cover an area of ground to make a lawn or field

video

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US / 'vɪdɪəʊ /

UK / ˈvɪdiˌo /

A2
  • adjecitve
  • Of a moving film, with sound
  • noun
  • Recording capturing action with sound
  • verb
  • To make a moving film of, with sound

want

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US / wɔnt /

UK / wɑnt, wɔnt /

A1
  • noun
  • Something you desire or wish for
  • State or condition of poverty
  • verb
  • To desire or wish for something; hope for a thing

collect

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US / kəˈlekt /

UK / kəˈlɛkt /

A2
  • adverb
  • By asking the receiver of a call to pay for it
  • verb
  • To ask for money, e.g. for a charity
  • To gather things, people together in one place
  • To get and keep one type of things as a hobby
  • To take things and bring them together
  • To go and receive, e.g. a prize or an award
  • To take control of your own feelings or thoughts

can

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US / kæn /

UK / kən,kæn /

A1
  • noun
  • A metal container for storing food
  • other
  • Able to; have the skill to; have the time to
  • verb
  • To have permission to
  • To be possible to do
  • To preserve food by sealing it in a metal container

sense

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US / sens /

UK / sɛns /

A1
  • noun
  • Certain mental feeling or emotion
  • Normal or clear state of mind
  • Meaning of a particular word, phrase or text
  • verb
  • To perceive using sight, sound, taste touch etc.
  • To recognize the presence of something

tangible

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US / ˈtændʒəbl /

UK / ˈtændʒəbəl /

B2
  • adjecitve
  • Able to be touched or felt; real
  • Able to be seen or noticed; obvious; apparent
  • noun
  • Item which can be seen and touched

whether

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US / ˈweðə(r) /

UK / ˈhwɛðɚ, ˈwɛð- /

A1
  • conjunction
  • If something will happen or not

support

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US / səˈpɔ:t /

UK / səˈpɔrt, -ˈport /

A1
  • noun
  • Assistance or advice given to someone
  • Evidence that helps prove something is true
  • A thing to hold up or prevent from falling down
  • verb
  • To give assistance or advice to someone
  • To help prove or show that something is true
  • To hold up or prevent from falling down

damage

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US / ˈdæmɪdʒ /

UK / ˈdæmɪdʒ /

A2
  • noun
  • Physical harm that is done to something
  • verb
  • To harm physically; to hurt or break something

medication

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US / ˌmedɪˈkeɪʃn /

UK / ˌmɛdɪˈkeʃən /

B2
  • noun
  • Substance to relieve pain or cure sickness

they

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US / ðeɪ /

UK / ðe /

A1
  • pronoun
  • Two or more people, animals, or things

build

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US / bɪld /

UK / bɪld /

A1
  • noun
  • Your physical shape; physique
  • verb
  • To establish e.g. a reputation, over time
  • To construct a house, office, factory

building

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US / ˈbɪldɪŋ /

UK / ˈbɪldɪŋ /

A1
  • noun
  • A structure with a roof and walls, e.g. a house
  • verb
  • To establish e.g. a reputation, over time
  • To construct a house, office, factory

combat

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US / 'kɒmbæt /

UK / kəmˈbæt, ˈkɑmˌbæt /

B1
  • verb
  • To fight someone or something physically

old

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US / əʊld /

UK / old /

A1
  • adjecitve
  • Having existed for a long time, not young or new
  • Age of a person since birth

throw

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US / θrəʊ /

UK / θroʊ /

A1
  • noun
  • Arm movement to make a thing fly through the air
  • Loose cloth or blanket (usually over a chair)
  • Forcibly putting someone on the ground
  • verb
  • To use your arm to make something fly in the air
  • To move part of your body suddenly and forcefully
  • To confuse or upset someone
  • (E.g. judo) to forcibly put someone on the ground
  • To put something somewhere suddenly and roughly

work

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US / wɜ:k /

UK / wɚk /

A1
  • adjecitve
  • Activity completed in order to make money
  • noun
  • The product of some artistic or literary endeavor
  • Everything created by an author, artist, musician
  • Activity you do in order to make money
  • Place of employment
  • Final product or result of a some labor or effort
  • verb
  • To bring into a specific state of success
  • To be functioning properly, e.g. a car
  • To do your job in your company or workplace
  • To make an effort to do something
  • To operate a machine or device

worry

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US / ˈwʌri /

UK / ˈwɜ:ri /

A1
  • noun
  • Something that causes trouble or concern
  • verb
  • To cause concern or trouble over something

add

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US / æd /

UK / æd /

A1
  • verb
  • To include as well
  • To put two things or numbers together, e.g. 2+2

dioxide

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US / daɪˈɒksaɪd /

UK / daɪˈɑksaɪd /

B2
  • noun
  • An oxide containing two oxides per molecule

discover

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US / dɪˈskʌvə(r) /

UK / dɪˈskʌvɚ /

A2
  • verb
  • To find something new that was not known before

chug

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US / tʃʌɡ /

UK / tʃʌɡ /

C1
  • verb
  • To move slowly making low sounds like steam trains

glow

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US / ɡləʊ /

UK / ɡlo /

B1
  • noun
  • Pink color in the face, e.g. from exercise/emotion
  • Pleasant feeling, as of happiness or satisfaction
  • Soft, steady light given off without a flame
  • verb
  • To look very healthy and contented
  • To emit a steady even light

take

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US / teɪk /

UK / tek /

A1
  • noun
  • Filming of a single scene for TV or the movies
  • verb
  • To accept something that is offered
  • To use a method of traveling, e.g. a bus or train
  • To use a camera to make (a photo)
  • To pick up something and go away with it
  • To study a subject in school
  • To attempt to pass (an exam)
  • To require a certain amount of time, money, space

algae

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US / ˈældʒi: /

UK / ˈældʒi /

B2
  • noun
  • Green organisms that live in still water

look

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US / lʊk /

UK / lʊk /

A1
  • noun
  • Person's beauty or physical attractiveness
  • Particular style of dress, clothes, or appearance
  • The way someone, something appears to be
  • Act of searching for or examining something
  • verb
  • To appear to be; seem

general

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US / 'dʒenrəl /

UK / ˈdʒɛnərəl /

A1
  • adjecitve
  • Widespread, normal or usual
  • noun
  • Top ranked officer in the army

upkeep

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US / ˈʌpki:p /

UK / ˈʌpˌkip /

A1
  • noun
  • Process of keeping something in good condition

regular

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US / ˈregjələ(r) /

UK / ˈrɛɡjəlɚ /

A2
  • adjecitve
  • Having an equal amount of space or time in between
  • Occurring or being done frequently
  • Being normal, usual, or average
  • noun
  • Customers who frequently visit a place
  • Soldier who has a permanent job in the army

thank

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US / θæŋk /

UK / θæŋk /

A1
  • verb
  • To tell someone you are grateful to them

scishow

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US / /

UK / /

A1

absorb

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US / əb'sɔ:b /

UK / əbˈsɔrb, -ˈzɔrb /

B1
  • verb
  • To take up all attention / energy of something
  • To take in a liquid; soak up

change

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US / tʃeɪndʒ /

UK / tʃendʒ /

A1
  • noun
  • Exchange of one set of clothes for another
  • Money in the form of coins instead of paper
  • Money returned after giving too much
  • Act of making or becoming something else
  • verb
  • To exchange one set of clothes for another
  • To exchange one kind of money for another
  • To replace something with another thing
  • To make or become something else
  • To go from one train, bus, etc. and go to another

both

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US / bəuθ /

UK / boθ /

A1
  • determiner
  • Used to refer to two things at the same time
  • pronoun
  • Used to refer to two things at the same time

hold

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US / həʊld /

UK / hold /

A1
  • noun
  • Section of a ship or plane used for storing things
  • Influence or power held over someone
  • Place of support for hands or feet when climbing
  • verb
  • To agree to keep something for someone
  • To have the capacity to support/contain something
  • To control an area and protect it from attack
  • To not allow someone to leave a place
  • To cause an event to happen at a place or time
  • To use hands or arms to carry or keep something
  • To have a specific quality or property
  • To keep an image, belief or feeling in your mind
  • To have or own something
  • To wait before being able to talk on the phone
  • To limit the movement of someone in a sport

irresistibly

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US / ˌɪrɪ'zɪstəblɪ /

UK / ˌɪrɪ'zɪstəblɪ /

B1
  • adverb
  • In such an appealing way you cannot say no

space

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US / speɪs /

UK / spes /

A1
  • noun
  • Empty area kept for a specific reason, like a car
  • Empty area with nothing in it
  • Area in the sky where the stars are
  • Area between written words on a page
  • verb
  • To make a certain distance or time between

reactor

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US / riˈæktə(r) /

UK / riˈæktɚ /

B1
  • noun
  • Device to control nuclear energy as a power source

someday

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US / 'sʌmdeɪ /

UK / 'sʌmˌdeɪ /

C2
  • adverb
  • At some unspecified time in the future

design

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US / dɪˈzaɪn /

UK / dɪˈzaɪn /

A1
  • noun
  • The way something is planned, to fulfill a purpose
  • verb
  • To plan in a particular way to fulfill a purpose
  • To think of a plan

install

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US / ɪnˈstɔ:l /

UK / ɪnˈstɔl /

A2
  • verb
  • To set up equipment so that it is ready to use
  • To place someone officially in a job position

their

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US / ðɛː /

UK / ðer /

A1
  • determiner
  • Belonging to them

way

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US / weɪ /

UK / we /

A1
  • adverb
  • Used to emphasize the amount of something
  • noun
  • Particular aspect of something being thought about
  • One of various choices that could be made
  • Particular existing condition or state
  • (Often long) distance or length of time
  • How something is done
  • Route to go to a place
  • Small street
  • Usual behavior, emotions or habits of someone

account

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US / ə'kaʊnt /

UK / əˈkaʊnt /

A1
  • noun
  • An advantage
  • Arrangement with a bank to keep your money for you
  • An invoice for things bought
  • Arrangement whereby you can use online services
  • A description, often written, of events; report

kilogram

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US / ˈkɪləgræm /

UK / ˈkɪləɡræm /

A2
  • noun
  • 1000g

solar

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US / 'səʊlə(r) /

UK / ˈsolɚ /

B1
  • adjecitve
  • Concerning the sun, or its heat

all

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US / ɔ:l /

UK / ɔl /

A1
  • adverb
  • Completely; totally
  • determiner
  • Being every one of something
  • pronoun
  • 100% of something; the complete amount

everyone

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US / ˈevriwʌn /

UK / ˈɛvriˌwʌn /

A1
  • pronoun
  • Every person; everybody

produce

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US / prə'dju:s /

UK / prəˈdus, -ˈdjus, pro- /

A1
  • noun
  • Fresh foods such as fruits and vegetables
  • verb
  • To grow something naturally
  • To make something appear
  • To manufacture something using machines
  • To control the making a movie or television show

patio

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US / ˈpætiəʊ /

UK / ˈpætioʊ /

B2
  • noun
  • Flat hard area outside house where people can sit

remove

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US / rɪˈmu:v /

UK / rɪˈmuv /

A1
  • verb
  • To get rid of something completely
  • To make someone leave his or her job or position
  • To move, erase or take away from a place
  • To take something off (e.g. clothing)

photosynthesis

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US / ˌfəʊtəʊˈsɪnθəsɪs /

UK / ˌfotoˈsɪnθɪsɪs /

C1
  • noun
  • Process of plants using the sun to make their food

who

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US / hu: /

UK / hu /

A1
  • pronoun
  • Which person
  • Used to introduce information about people

pollutant

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US / pəˈlu:tənt /

UK / pəˈlutn:t /

C1
  • noun
  • Toxic substance harmful to the environment

science

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US / 'saɪəns /

UK / ˈsaɪəns /

A2
  • noun
  • Study of the physical world, based on facts

complicate

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US / ˈkɒmplɪkeɪt /

UK / ˈkɑ:mplɪkeɪt /

B1
  • verb
  • To make more difficult to do, understand or use

here

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US / hɪə(r) /

UK / hɪr /

A1
  • adverb
  • In this place; at this location, position or time

production

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US / prəˈdʌkʃn /

UK / prəˈdʌkʃən, pro- /

A2
  • noun
  • Process of producing or growing food naturally
  • Process of making something on a large scale
  • Process of making a movie or TV show

new

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US / nju: /

UK / nu, nju /

A1
  • adjecitve
  • Not old, recently born, built or made
  • Being or doing something for the first time
  • Not felt, seen or known previously
  • Having been recently bought or obtained

try

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US / traɪ /

UK / traɪ /

A1
  • noun
  • Act of putting the ball over the rugby goal line
  • verb
  • To make an effort, to attempt to do something
  • To examine someone or something in a court of law
  • To test to see if it is good or you like it
  • To make a person go through hardship; test
  • To examine something to see if it works

burn

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US / bɜ:n /

UK / bɚn /

A1
  • noun
  • Damage from fire or heat
  • verb
  • To destroy with fire
  • To feel pain and heat
  • To use as fuel for a fire to make light or heat
  • To overcook food with too much heat it goes black

contain

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US / kənˈteɪn /

UK / kənˈten /

A2
  • verb
  • To keep something from spreading
  • To hold something inside something else

matter

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US / 'mætə(r) /

UK / ˈmætɚ /

A1
  • noun
  • Material all things are made of that fills space
  • Problem or reason for concern
  • verb
  • To be of great importance; to count

reside

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US / rɪˈzaɪd /

UK / rɪˈzaɪd /

B1
  • verb
  • To live in; dwell; to be present

stem

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US / stem /

UK / stɛm /

B1
  • noun
  • Long thin central part of a plant, bearing leaves
  • Long thin part supporting something e.g. a light
  • Main part of a word, e.g. 'use' in 'useful'
  • verb
  • To remove the stem of a flower or fruit
  • To start from or be the origin of
  • To stop something bad from spreading or developing

wait

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US / weɪt /

UK / wet /

A1
  • verb
  • To delay or not do something until later
  • To spend time until an expected thing happens
  • To remain in a place until a thing happens

puzzle

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US / 'pʌzl /

UK / ˈpʌzəl /

A2
  • noun
  • Something challenging to explain or understand
  • Game requiring the player to find an answer
  • Game with many pieces, e.g. forming a picture
  • A problem requiring thought and skill to be solved
  • verb
  • To be a challenge to understand; confuse

realize

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US / 'ri:əlaɪz /

UK / ˈriəˌlaɪz /

A1
  • verb
  • To become aware of or understand mentally

use

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US / ju:s /

UK / ju:s /

A1
  • noun
  • Ability to employ something
  • Need to enable it to work
  • Permission to do something with something
  • Act of spending money
  • Operation of a machine for its function
  • verb
  • To have; to eat, drink, consume etc.
  • To need to operate or work
  • To operate a machine, e.g. a computer
  • To treat a person badly
  • To do something with, for a task or purpose

walk

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US / wɔ:k /

UK / wɔk /

A1
  • noun
  • Journey on foot done for pleasure or exercise
  • verb
  • To move with your legs at a slowish pace

calibrate

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US / ˈkælɪbreɪt /

UK / ˈkæləˌbret /

C1
  • verb
  • To adjust an instrument to take exact measurements

novel

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US / 'nɒvl /

UK / ˈnɑvəl /

A2
  • adjecitve
  • Unusual and new or different from previous things
  • noun
  • Written fiction story

bus

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US / bʌs /

UK / bʌs /

A1
  • noun
  • A large road vehicle used for carrying many people
  • verb
  • To move people by coach or bus

explain

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US / ɪk'spleɪn /

UK / ɪkˈsplen /

A1
  • verb
  • To make clear or easy to understand by describing

electronic

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US / ɪˌlek'trɒnɪk /

UK / ɪlɛkˈtrɑnɪk, ˌilɛk- /

A2
  • adjecitve
  • Operating by use of electricity; digital

container

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US / kənˈteɪnə(r) /

UK / kənˈtenɚ /

A2
  • noun
  • An object that can be used to hold things

fresh

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US / freʃ /

UK / frɛʃ /

A1
  • adjecitve
  • Clean; not used or dirty
  • Remaining clear, as in a person's memory
  • Newly made or gathered
  • (Water) not salty, usually from a lake or a river

episode

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US / 'epɪsəʊd /

UK / ˈɛpɪˌsod /

B1
  • noun
  • One separate event in a series of events
  • Show which is part of a larger story

liquid

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US / ˈlɪkwɪd /

UK / ˈlɪkwɪd /

A2
  • adjecitve
  • (Of wealth) being able to be spent as cash
  • In a state of being uncertain
  • Moving in a flowing manner, like water or oil
  • noun
  • Something that is similar to the state of water

intuitive

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US / ɪnˈtju:ɪtɪv /

UK / ɪnˈtuɪtɪv, -ˈtju- /

B2
  • adjecitve
  • Able to understand by feeling rather than fact

wild

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US / waɪld /

UK / waɪld /

A2
  • adjecitve
  • Living in nature; not tame
  • (Of land) not developed by people
  • adverb
  • In a manner which lacks control
  • noun
  • A natural environment e.g. jungle, forest

will

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US / wɪl /

UK / wɪl /

A1
  • noun
  • Desire or choice of someone
  • Document saying who gets your money when you die
  • Strong desire to do something; determination
  • Desire to do something; strong wish to do
  • other
  • Used with verbs to express the future
  • verb
  • To leave property to someone after your death
  • To use mental effort to make something happen
  • Am (is, are) likely to do
  • To influence someone to do something
  • To make something happen by strongly wanting it

area

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US / 'eərɪə /

UK / ˈɛriə /

A1
  • noun
  • Amount of measured space
  • A specific section or space; part of a region
  • A subject or field of study

capture

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US / 'kæptʃə(r) /

UK / ˈkæptʃɚ /

B1
  • verb
  • To attract and hold e.g. interest, attention
  • To record, tape, or film something
  • To catch and prevent from being free
  • To take control of a place or object by force

concern

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US / kənˈsɜ:n /

UK / kənˈsɚn /

A2
  • noun
  • Company, firm or business
  • Feeling of worry or anxiety
  • verb
  • To be about a particular topic
  • To have a direct impact on someone
  • To be responsible or mixed up in; to be involved
  • To feel worry or anxiety

carbon

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US / 'kɑ:bən /

UK / ˈkɑrbən /

B1
  • noun
  • Chemical element with an atomic number of 6

feel

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US / fi:l /

UK / fil /

A1
  • verb
  • To be aware of or experience an emotion, sensation
  • To sense through direct contact; touch

equivalent

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US / ɪˈkwɪvələnt /

UK / ɪˈkwɪvələnt /

B1
  • adjecitve
  • Equal to something in value, use or meaning
  • noun
  • Thing like another in quality, quantity or degree

memory

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US / 'memərɪ /

UK / ˈmɛməri /

A2
  • noun
  • Ability of the mind to call back past things
  • Space for the storage of information on a computer
  • Something that has been remembered

plus

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US / plʌs /

UK / plʌs /

A2
  • noun
  • A benefit or advantage
  • preposition
  • In addition; add
  • In addition to; Indicates a number above
  • Having a value greater than zero

rid

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US / rɪd /

UK / rɪd /

A2
  • verb
  • To cause to no longer have (pest, problem)

too

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US / tu: /

UK / tu /

A1
  • adverb
  • In addition, also; with emphasis
  • Say that something is more than you want

about

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US / ə'baʊt /

UK / əˈbaʊt /

A1
  • adverb
  • To be ready to; going to
  • Nearly; approximately; roughly
  • Near; next to; close to
  • In every direction; in the area of
  • preposition
  • Concerning or of (a topic)

backyard

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US / ˌbækˈjɑ:d /

UK / ˌbækˈjɑ:rd /

C2
  • adjecitve
  • Made in an amateurish or non-professional way
  • noun
  • Yard or garden behind a house

even

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US / 'i:vn /

UK / ˈivən /

A1
  • adjecitve
  • Being equal in influence, power, possibility etc.
  • Being divided equally or fairly
  • (Of teams/contest) with similar chances of success
  • Smooth, level, or regular
  • Can be divided by 2; ending in 2, 4, 6, 8, or 0
  • At a regular, equally steady manner
  • Remaining steady and unchanging
  • adverb
  • (When this is surprising) as well; too
  • (Used to compare two things/stress the difference)
  • verb
  • To make something level; to flatten
  • To make something equal

health

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US / helθ /

UK / hɛlθ /

A1
  • noun
  • (Person, company) being in a good condition; well

like

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US / laɪk /

UK / laɪk /

A1
  • adjecitve
  • Being equal in status or kind to something else
  • Similar; the same
  • adverb
  • For example
  • preposition
  • Used as a filler; used to ad emphasis
  • In a way similar to the way something is done
  • Such as; for example
  • verb
  • To want to
  • To find something pleasing; to prefer something

people

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US / 'pi:pl /

UK / ˈpipəl /

A1
  • noun
  • Persons sharing culture, country, background, etc.
  • Men, Women, Children

sit

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US / sɪt /

UK / sɪt /

A1
  • verb
  • To take an exam
  • To be in a resting position on a chair
  • To provide seating for people
  • To remain in a still position while being painted

what

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US / wɒt /

UK / hwɑt, hwʌt, wɔt, wʌt,hwət, wət /

A1
  • pronoun
  • Thing or things that; the same kind as
  • Used to emphasize something you are about to say
  • adjecitve
  • Used to refer to a particular amount, or number
  • Used to place emphasis on a particular quality
  • adverb
  • To a certain degree
  • determiner
  • Question words used for asking for information
  • exclamation
  • Used to express excitement, shock, or surprise
  • Used to ask people to repeat something they said

that

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US / ðæt /

UK / ðæt, ðət /

A1
  • adjecitve
  • The person or thing being talked about
  • Used to identify something both the speakers know
  • adverb
  • Used to reinforce adjectives and adverbs
  • To such a degree
  • conjunction
  • Used to connect a noun clause
  • Used to introduce an adverbial clause
  • Used to introduce a noun clause
  • determiner
  • Used as a noun to refer to something
  • pronoun
  • Referring an object far away
  • Used to refer to the relative pronoun ‘which’

thrive

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US / θraɪv /

UK / θraɪv /

B2
  • verb
  • To be or become healthy or successful

week

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US / wi:k /

UK / wik /

A1
  • noun
  • Period of seven days from Sunday to Saturday

family

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US / 'fæməlɪ /

UK / ˈfæmli /

A1
  • noun
  • Close group of people or organizations
  • A group of people who are related through blood
  • Group of related plants or animals

down

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US / daʊn /

UK / daʊn /

A1
  • adjecitve
  • Being sad, sick, or unhappy
  • Not operating, working, or functioning as expected
  • adverb
  • In a sitting or lying position
  • Towards or on the ground, floor, or bottom
  • Written or copied onto a piece of paper or book
  • noun
  • A period of play in American Football
  • The soft, smooth hairs that cover a bird's body
  • preposition
  • Along something's path, course, or direction
  • Going from a higher position to a lower position
  • verb
  • To eat or drink very quickly and without stopping

county

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US / ˈkaʊnti /

UK / ˈkaʊnti /

A2
  • noun
  • Administrative region within a country or a state

endless

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US / ˈendləs /

UK / ˈɛndlɪs /

A2
  • adjecitve
  • Having or appearing to have no end

juice

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US / dʒu:s /

UK / dʒus /

A2
  • noun
  • Liquids (often squeezed from vegetables, fruit)
  • Something that supplies power, e.g. electricity

purify

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US / ˈpjʊərɪfaɪ /

UK / ˈpjʊrɪfaɪ /

B2
  • verb
  • To make pure by removing unwanted substances
  • To make someone feel pure by removing guilt

birth

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US / bɜ:θ /

UK / bɜ:rθ /

A2
  • noun
  • Time when a baby or young animal is born
  • Beginning of something
  • Social position based on the family you come from

city

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US / 'sɪtɪ /

UK / ˈsɪti /

A1
  • noun
  • Area with many buildings, roads and people

find

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US / faɪnd /

UK / faɪnd /

A1
  • noun
  • Object discovered by chance
  • Things that have been discovered from searching
  • verb
  • To become aware of something that is happening
  • To discover or meet by chance
  • To decide if someone is guilty of a crime, or not
  • To learn through study, research, or effort
  • To discover something by looking for it

great

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US / ɡreɪt /

UK / ɡret /

A1
  • adjecitve
  • Very large in size
  • Very important
  • Very good; fantastic; wonderful
  • adverb
  • Very good; better than before
  • noun
  • Successful and well-admired person

oxygen

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US / 'ɒksɪdʒən /

UK / ˈɑksɪdʒən /

B1
  • noun
  • A gas in the air that we need to breathe

purification

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US / ˌpjʊərɪfɪ'keɪʃn /

UK / ˌpjʊrəfɪˈkeʃən /

B2
  • noun
  • Act of removing unwanted substances
  • Ceremonial cleansing from sin

mean

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US / mi:n /

UK / min /

A1
  • adjecitve
  • Being good at
  • Nasty; unkind
  • Not liking to spend money; cheap; stingy
  • noun
  • Average of a set of numbers
  • verb
  • To express a particular idea or thought
  • To intend to do something in particular
  • To have a particular meaning or value

require

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US / rɪ'kwaɪə(r) /

UK / rɪˈkwaɪr /

A2
  • verb
  • To demand that someone does something
  • To need to do something, to make it necessary

tend

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US / tend /

UK / tɛnd /

A2
  • verb
  • To move or act in a certain manner
  • To take care of
  • To regularly behave in a certain way

watch

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US / wɒtʃ /

UK / wɑtʃ /

A1
  • noun
  • Period of time someone is responsible for guarding
  • Device you wear on your wrist that shows the time
  • Official warning statement, e.g. of bad weather
  • verb
  • To keep in check, manage, or control something
  • To look at something for entertainment, e.g. TV
  • To guard a place or people; protect child, etc.
  • To look at carefully to work out what is happening
  • To protect and care for someone or something

everywhere

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US / ˈevriweə(r) /

UK / ˈevriwer /

A1
  • adverb
  • Every place

growth

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US / grəʊθ /

UK / groʊθ /

A2
  • noun
  • Improvement, development in a skill over time
  • A mass on the skin or body part related to illness
  • Act of growing

cause

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US / kɔ:z /

UK / kɔz /

A2
  • noun
  • Belief, goal or organization that people support
  • Reason for
  • verb
  • To make something happen; create effect or result

place

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US / pleɪs /

UK / ples /

A1
  • noun
  • Particular location, area or region
  • verb
  • To put someone in a particular type of situation
  • To put something in a certain location or position

starter

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US / ˈstɑ:tə(r) /

UK / ˈstɑ:rtə(r) /

A2
  • noun
  • Electric motor for starting an engine
  • First part of a big meal, e.g. soup or salad

pill

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US / pɪl /

UK / pɪl /

A2
  • noun
  • Person who is difficult to deal with
  • Small, round piece of medicine that is swallowed

grab

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US / ɡræb /

UK / ɡræb /

A2
  • verb
  • To take and hold something quickly

nothing

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US / 'nʌθɪŋ /

UK / ˈnʌθɪŋ /

A1
  • noun
  • Item of little or no value, importance, interest
  • Number or value of zero
  • pronoun
  • Not anything, not a single thing

specie

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US / 'spi:ʃi: /

UK / 'spi:ʃɪ /

B1
  • noun
  • Singular of species

square

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US / skweə(r) /

UK / skwɛr /

A2
  • adjecitve
  • Being fair or honest
  • Multiply a number by itself e.g. 2x2 or 6x6
  • noun
  • Shape with 4 equal length sides and 4 equal angles
  • The result of multiplying Length by the width
  • Open public area in the middle of the town
  • verb
  • To make something balance or be equal
  • To multiply a number by itself, e.g. 2x2 or 6x8
  • To straighten the edge to form a four-sided shape

stay

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US / steɪ /

UK / ste /

A1
  • noun
  • Legal order to stop or delay an action
  • Strong rope or wire that supports a ship's mast
  • Period of time spent living in or visiting a place
  • verb
  • To keep trying without giving up
  • To remain in the same place and not move away
  • To spend time visiting a place or someone's home

winter

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US / ˈwɪntə(r) /

UK / ˈwɪntɚ /

A1
  • adjecitve
  • (Food) planted in fall and gathered next year
  • noun
  • Time or season of idleness or decay
  • Coldest season of the year
  • verb
  • To spend the cold months at a certain place

seasonal

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US / ˈsi:zənl /

UK / ˈsizənəl /

A2
  • adjecitve
  • Of or occurring at a particular time of year

solve

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US / sɒlv /

UK / sɑ:lv /

A2
  • verb
  • To figure out a way to handle a difficult problem

action

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US / 'ækʃn /

UK / ˈækʃən /

A2
  • noun
  • Something that a person or thing does
  • verb
  • To act to do something

bacteria

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US / bæk'tɪərɪə /

UK / bækˈtɪriə /

B2
  • noun
  • The very small creatures that can cause disease

get

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US / ɡet /

UK / ɡɛt /

A1
  • verb
  • To become affected by illness or disease
  • To begin to feel or understand an emotion or idea
  • To send or bring someone or something home, etc.
  • To go somewhere to obtain something
  • To (cause to) do a particular thing
  • To obtain, receive or be given something
  • To currently have
  • To prepare for use
  • To understand something being said or read

hard

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US / hɑ:d /

UK / hɑː(r)d /

A1
  • adjecitve
  • Difficult to do; difficult to understand
  • (Of facts) not able to be misunderstood; clear
  • (Of alcohol) strong
  • Involving or requiring lots of work, effort, care
  • Being full of pain, trouble, and problems
  • Strong
  • (Of edge) clear; sharp
  • Difficult to bend, break or cut; solid
  • adverb
  • With lots of force, power, or impact

roughly

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US / ˈrʌfli /

UK / ˈrʌflɪ /

B1
  • adverb
  • Approximately; (of numbers) about; around
  • In a manner that is violent or not careful
  • In an inexact, imprecise or violent way
  • In a basic, simple manner

from

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US / frəm /

UK / frʌm, frɑm,frəm /

A1
  • preposition
  • Starting at a particular place, time or level

deeply

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US / ˈdi:pli /

UK / ˈdiplɪ /

A2
  • adverb
  • To a significant degree
  • To a great, intense or extreme extent

out

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US / aʊt /

UK / aʊt /

A1
  • adverb
  • No longer stylish (e.g. fashion)
  • Away from home, business, or the usual place
  • In a direction/movement away from inside or center
  • noun
  • Act when a batter cannot continue playing
  • verb
  • To tell people a secret

temperature

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US / ˈtemprətʃə(r) /

UK / ˈtɛmpərəˌtʃʊr,-tʃɚ,ˈtɛmprə- /

A2
  • noun
  • When you your body heat is above normal
  • How hot or cold something is, e.g. the weather

environment

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US / ɪn'vaɪrənmənt /

UK / ɛnˈvaɪrənmənt, -ˈvaɪən- /

A1
  • noun
  • Natural world in which plants and animals live
  • The entire surrounding conditions of something

neighbourhood

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US / ˈneɪbəhʊd /

UK / ˈneɪbərhʊd /

B1
  • noun
  • Area of a town or city that people live in

mental

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US / ˈmentl /

UK / ˈmɛntl /

A2
  • adjecitve
  • Concerning the mind

ton

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US / tʌn /

UK / tʌn /

A2
  • noun
  • Unit of weight; 907 kilograms (US); 1016 (UK)

clean

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US / kli:n /

UK / klin /

A1
  • adjecitve
  • Not marked in any way; blank
  • Done according to the rules or standards; fair
  • Free from disease or sickness
  • Being free from dirt or marks; washed
  • Behaving well; not breaking any rules; legal
  • adverb
  • Completely; entirely
  • verb
  • To make free from dirt or marks; washed
  • To make neat and orderly e.g. a room
  • To remove the inner parts of an animal

put

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US / pʊt /

UK / pʊt /

A1
  • phrasal verb
  • to make a light stop shining by pressing or moving a switch
  • verb
  • To move or place a thing in a particular position
  • To rate something in importance or value
  • To write or say something in a certain manner

release

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US / rɪ'li:s /

UK / rɪ'li:s /

A2
  • noun
  • Act of freeing someone from a duty or burden
  • Introduction of a new product, film, book, etc.
  • Relief from sadness, suffering or trouble
  • Act of freeing from a jail, cage, prison, etc.
  • verb
  • To free someone from a responsibility or burden
  • To allow a film, music etc. to be sold/distributed
  • To allow to leave a jail, cage, etc.; let out
  • To let go of something you are holding

two

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US / tu: /

UK / tu /

A1
  • number
  • 2

environmental

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US / ɪnˌvaɪrənˈmentl /

UK / ɛnˌvaɪrənˈmɛntl:, -ˌvaɪən /

A2
  • adjecitve
  • Of the natural world of plants and animals

keep

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US / ki:p /

UK / kip /

A1
  • noun
  • Large, strong tower in the middle of a castle
  • Money spent on you so you can live in a place
  • verb
  • To continue doing something; not to stop
  • To stop balls going in a goal in sports
  • To not give back or return something
  • (Of food) to not spoil or not rot
  • To take possession of something to own, e.g. a pet
  • To have and continue to hold something
  • To do something that you have promised or agreed
  • To stay in a certain place or condition
  • To maintain the rules

maintain

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US / meɪn'teɪn /

UK / menˈten /

A2
  • verb
  • To keep saying something a certain way
  • To keep (machine) working by checking, repairing
  • To keep, exist or continue without changing

prototype

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US / ˈprəʊ.tə.taɪp /

UK / ˈproʊ.t̬ə.taɪp /

B2
  • noun
  • A first or preliminary version of a device or vehicle from which other forms are developed

slash

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US / slæʃ /

UK / slæʃ /

B2
  • noun
  • Line ( / ) used in writing
  • Long, deep cut, caused by a sharp object
  • verb
  • To cut violently with a sharp object
  • To decrease something by a large amount

something

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US / ˈsʌmθɪŋ /

UK / ˈsʌmθɪŋ /

A1
  • adverb
  • In some degree or measure
  • noun
  • a person or thing of some value or consequence
  • pronoun
  • Thing that is not yet known or named
  • Approximately

large

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US / lɑ:dʒ /

UK / lɑ:rdʒ /

A1
  • adjecitve
  • Big; of great size; broad, tall, wide, or fat

kid

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US / kɪd /

UK / kɪd /

A2
  • adjecitve
  • Made from young goat skin
  • noun
  • Child or young person
  • Young goat
  • verb
  • To make fun of someone in a gentle way; to tease

most

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US / məʊst /

UK / most /

A1
  • adverb
  • Very; extremely
  • Greatest possible degree
  • pronoun
  • Nearly all of something

and

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US / ənd /

UK / ənd, ən,ænd /

A1
  • conjunction
  • Used to refer to two or more things
  • Plus; in addition; on top of that
  • Used to introduce an action that follows another

back

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US / bæk /

UK / bæk /

A1
  • adjecitve
  • Farthest from the front e.g. in a classroom
  • adverb
  • Have returned to a place you were before
  • noun
  • The part of a chair that the upper body leans upon
  • Location at the rear of something
  • The reverse of side something
  • Area on the rear of your body
  • verb
  • To bet money on something
  • To go backwards in a car
  • To support and encourage someone or some cause

biological

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US / ˌbaɪəˈlɒdʒɪkl /

UK / ˌbaɪəˈlɑdʒɪkəl /

B1
  • adjecitve
  • Being related to life and living things

intro

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US / ˈɪntrəʊ /

UK / ˈɪntroʊ /

A1
  • noun
  • Opening part of a text or piece of music

lot

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US / lɒt /

UK / lɑt /

A1
  • noun
  • What happens to a person in life from chance; fate
  • A group of people seen together
  • Item for sale at an auction
  • Small area of land used for a purpose e.g. parking

pollen

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US / ˈpɒlən /

UK / ˈpɑ:lən /

B2
  • noun
  • Fine, usually yellow powder produced by plants

until

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US / ənˈtɪl /

UK / ʌnˈtɪl /

A1
  • conjunction
  • Up to; to a time when something happens
  • preposition
  • Before (a specific time)

estradiol

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US / /

UK / ˌestrəˈdaɪˌɔl; ˌestrəˈdaɪˌol; ˌestrəˈdaɪˌɑl /

A1
  • noun
  • Most powerful female hormone that occurs naturally; synthesized and used to treat estrogen deficienc

far

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US / fɑ:(r) /

UK / fɑr /

A1
  • adjecitve
  • A long way away
  • Being a long way away
  • adverb
  • To a large degree or extent

double

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US / 'dʌbl /

UK / ˈdʌbəl /

A2
  • adjecitve
  • Concerning or intended for use by two people
  • Two times the amount or degree; twice
  • Made of two parts that are the same, similar
  • noun
  • Person that is exactly like someone else
  • verb
  • To be used for two functions at the same time
  • To make or become twice as much

leave

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US / li:v /

UK / liv /

A1
  • noun
  • Permission to do something
  • Vacation time; time off work
  • verb
  • To go away from; depart
  • To gift property to someone after you die
  • To allow something to continue happening
  • To let something remain unused or available
  • To let something or someone remain somewhere

pollution

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US / pəˈlu:ʃn /

UK / pəˈluʃən /

B1
  • noun
  • Dangerous substances released into an environment

picture

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US / 'pɪktʃə(r) /

UK / ˈpɪktʃɚ /

A1
  • noun
  • General situation or state of being
  • Mental image of what something is or looks like
  • Movie; film
  • Painting, drawing or photograph on paper or screen
  • verb
  • To understand or imagine something
  • To imagine someone or something in an image

tree

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US / tri: /

UK / tri /

A1
  • noun
  • Tall green plants in a forest

where

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US / hwɛə /

UK / hwɛr, wɛr /

A1
  • conjunction
  • At or in the place which
  • In whatever place
  • pronoun
  • Word you use to ask the location of something

any

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US / 'enɪ /

UK / ˈɛni /

A1
  • adjecitve
  • One, or some, no matter which
  • pronoun
  • One (thing) of many; some

company

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US / 'kʌmpənɪ /

UK / ˈkʌmpəni /

A1
  • noun
  • Good feeling from being with someone else
  • A business that sells things or provides services
  • Guests, especially in your home
  • Being with another person rather than alone

deciduous

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US / dɪˈsɪdʒuəs /

UK / dɪˈsɪdʒuəs /

C1
  • adjecitve
  • (Of leaves) falling off during the fall

game

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US / ɡeɪm /

UK / ɡem /

A1
  • noun
  • Activity with rules that people play to have fun
  • Birds and animals people hunt to kill and eat
  • Match between two teams

help

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US / help /

UK / hɛlp /

A1
  • noun
  • Something given to enable a person to do something
  • Assistance given to someone in need
  • Someone who makes something easier or possible
  • verb
  • To act to enable a person to do something; assist
  • To make something better or less difficult

literally

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US / ˈlɪtərəli /

UK / ˈlɪtərəli /

B1
  • adverb
  • So as to express the exact meaning of something
  • Used to say something is true, even if unlikely

particulate

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US / pɑːˈtɪkjələt /

UK / pɑːrˈtɪkjələt /

A1
  • verb
  • Microscopic particle

treehouse

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US / /

UK / /

C2
  • noun
  • Small play shelter built in a tree for children
  • Subtitles section
  • This episode of SciShow is supported by Spintronics.
  • Spintronics is a new game where players build mechanical circuits to solve puzzles.
  • You can head to upperstory.com slash spintronics to see the game in action.
  • I don't know about you, but I love trees.
  • There's nothing quite like going for a walk down a forest path, sitting on a tree-shaded patio, or making memories in a backyard treehouse.
  • And trees have tons of benefits.
  • They get rid of excess carbon dioxide and make tasty, fresh oxygen for us to breathe.
  • But some of the places where it's hardest to plant and maintain those trees are the same places that need them the most, like big cities.
  • That's why some researchers are trying to improve on nature's design by making trees liquid.
  • INTRO To be clear, we are extremely pro-tree on SciShow.
  • Trees help combat climate change by storing excess carbon dioxide from the atmosphere, produce the oxygen we need to breathe, and capture particulates to help purify the air.
  • But as great as trees are, they just don't make sense to grow everywhere.
  • For starters, trees are… big.
  • We literally compare things to trees to explain that things are big.
  • They also need to be planted in nutrient-rich soil.
  • Space and soil are two things cities don't have a lot of.
  • Plus, trees' root systems can cause damage to infrastructure like sidewalks and sewers.
  • And as good as trees are at removing pollutants from the air, they tend to just hold onto them afterwards.
  • So trees in areas that have high levels of air pollution, like cities, tend to have shorter lifespans and not thrive as well.
  • A tree can absorb up to 150 kilograms of carbon per year.
  • Which sounds great, until you realize that's not even as much carbon as is produced by a single car burning through one tank of gas.
  • So that means that one of the biggest benefits of trees requires way more trees than just one or two.
  • We're talking forests that spread into the suburbs' levels of tree cover.
  • Plus, growing and maintaining urban trees requires that cities, counties, governments, and neighborhoods are all invested in keeping the trees happy long-term, which is easier said than done.
  • And that's not even taking into account some of the downsides of trees, like how miserable seasonal pollen allergies can make people feel.
  • Since one quarter of adults in the US have seasonal allergies, that misery is nothing to sneeze at.
  • So some researchers are looking into whether we can use not-trees to give us some of the same benefits that trees do.
  • That's led them to photobioreactors.
  • Photobioreactors are closed, lit containers that contain lots and lots of tiny, photosynthesizing organisms, all in a carefully calibrated system to allow people to control their growth.
  • Picture a giant, green, glowing water tank full of algae or bacteria.
  • Thanks to photosynthesis, the organisms in the tanks remove carbon dioxide from the environment and release oxygen back into the air.
  • Besides their potential future as tree juice, photobioreactors have a ton of uses, like wastewater treatment.
  • When water passes through a reactor, the algae filter out pollutants like nitrogen and phosphorus.
  • They can even grab contaminants like estradiol, which is a hormone found in birth control pills, and larger organic matter, like, you know, the kind you would find in, uh, wastewater.
  • We're also discovering that some microalgae produce biological compounds that can be important for things like medications.
  • And when you grow those algae in a photobioreactor, the production of those compounds is controlled and efficient, so it'd be way better than just collecting the compounds from wild algae.
  • If you want to get all sci-fi about it, photobioreactors could someday be used to remove carbon dioxide and release oxygen in spacecraft.
  • Plus, grow greens for space salads that are 100% edible.
  • Because algae wouldn't have roots, stems, or leaves to throw away, there's no waste.
  • And back here on Earth, photobioreactors are being used to grow spirulina, the superfood everyone is chugging, baking, and smoothing into gorgeous blue foods that add a protein punch.
  • So, just in general, photobioreactors have a lot of awesome things they can help us do.
  • But why are we interested in them as the future of trees?
  • Well, photobioreactors' ability to remove carbon dioxide and release oxygen sounds a heck of a lot like what trees do.
  • Specifically, what we really need trees to do in places that have a lot of carbon dioxide and a lot of people who need oxygen, but where they struggle to thrive.
  • Places like cities.
  • Which is why researchers in Serbia created the LIQUID-3 photobioreactor that now resides in Belgrade.
  • The LIQUID-3 uses a species of single-celled algae that grows in Serbia.
  • The algae is resistant to high and low temperatures, which means that the trees can photosynthesize and pump out fresh O2 year-round instead of taking the winter off like deciduous trees do.
  • According to one of the researchers, a 600-liter tank does the same work as two 10-year-old trees, or 200 square meters of grass, all in roughly the area of a park bench.
  • This prototype has a solar panel that generates the electricity needed to light it at night, which means it doubles as a street lamp, a bench, and built-in phone charging stations.
  • So in addition to air purification, liquid trees have the added benefit of being able to provide other needed services.
  • Maybe solar-powered heaters in cold cities or bus stops with electrified timetables.
  • Plus, a giant glowing green tank in the middle of a city sidewalk just looks cool.
  • They can also work as a more immediate, short-term solution to urgent pollution and air quality concerns.
  • The LIQUID-3 is ready to start cleaning the air as soon as it's installed, instead of having to wait as long as 30 years to get the oxygen-producing capacity of an adult tree.
  • And photobioreactors are lower-maintenance than trees.
  • As the algae grows, some of it needs to be removed every six weeks or so, but that's about it as far as regular upkeep.
  • And that surplus algae can be used as a fertilizer, so nothing really gets wasted.
  • Plus, you're not limited by location, because photobioreactors can be made into any shape.
  • You can put them in the most polluted areas of a city where they'd have the most benefit, without worrying about whether there's soil to support an actual tree.
  • So liquid trees can potentially give us some of the environmental benefits of tree trees without the complicating factors.
  • But as cool as they look, liquid trees aren't going to replace the aesthetic and mental health benefits of having green spaces around, especially in cities.
  • Which means they're never going to be able to replace trees.
  • Both tanks and trunks will have a part to play as we try to build cleaner, greener cities.
  • And I'm not giving up my treehouse any time soon.
  • Thanks for watching this SciShow video, and thanks to Spintronics for supporting it.
  • Spintronics is a puzzle and a graphic novel, and a time-traveling educational game to play by yourself or with family and friends.
  • It takes you back to a time when you get to discover electricity.
  • As the game goes on, you'll make more and more sophisticated circuits to serve your growing needs.
  • By building mechanical equivalents to today's electronics, this game makes circuits tangible, irresistibly touchable, and deeply intuitive.
  • Just like SciShow, this company is all about endless curiosity, so Spintronics is great for kids and adults because you're never too old to learn something.
  • And you can learn more about the science of the game at upperstory.com slash spintronics today.
  • Thanks for staying curious with us!