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Why Planets Are Round

Video vocabulary

here

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US / hɪə(r) /

UK / hɪr /

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

lose

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US / lu:z /

UK / luz /

A1
  • verb
  • To be unable to keep in check or control something
  • To decrease in value or quantity (e.g. weight)
  • To stop having certain qualities or abilities
  • To stop having or being entitled to
  • To fail to win something that is being contested
  • To be unable to find something you once had
  • To be dependent on someone (used with 'not')

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

satisfied

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US / ˈsætɪsfaɪd /

UK / ˈsætɪsˌfaɪd /

A2
  • adjecitve
  • Happy because you got what you wanted; content
  • verb
  • To make someone happy because they got their wish
  • To do what is required in order to finish

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

small

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US / smɔ:l /

UK / smɔl /

A1
  • adjecitve
  • Little in size; not big
  • (Of letters) not written in capital letters
  • Being insignificant or minor
  • (Of a business) with few people or things; local
  • (Of voice) being soft and quiet
  • (Of a child) being young

stupid

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US / ˈstju:pɪd /

UK / ˈstu:pɪd /

A2
  • adjecitve
  • Not intelligent; lacking ability to learn easily

particle

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US / ˈpɑ:tɪkl /

UK / ˈpɑrtɪkəl /

B1
  • noun
  • Adverb or preposition that joins with a verb
  • Tiny piece or quantity of something

weird

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US / wɪəd /

UK / wɪrd /

B1
  • adjecitve
  • Odd or unusual; surprising; strange

true

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US / tru: /

UK / tru: /

A1
  • adjecitve
  • Agreeing with the facts; not false; real or actual

someone

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US / ˈsʌmwʌn /

UK / ˈsʌmˌwʌn, -wən /

A1
  • pronoun
  • Person who is not known or named

straight

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US / streɪt /

UK / stret /

A2
  • adjecitve
  • Not having curves, bends, or angles
  • Not gay; heterosexual
  • honest and direct
  • adverb
  • in a line; immediately; honestly and directly

exactly

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US / ɪgˈzæktli /

UK / ɪɡˈzæktli /

A1
  • adverb
  • No more and no less than; precisely

continue

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US / kən'tɪnju: /

UK / kənˈtɪnju /

A1
  • verb
  • To do something without stopping, or after pausing
  • To start doing again after a break, pause, or stop

fail

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US / feɪl /

UK / fel /

A1
  • noun
  • A mark on a test showing you did not pass
  • verb
  • To be unsuccessful in passing a class or exam
  • To not do or provide something that is needed
  • To stop working or functioning; to break down
  • To not achieve a goal, or to go wrong

unless

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US / ənˈles /

UK / ʌnˈlɛs /

A2
  • conjunction
  • Negative of 'if'

temporary

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US / ˈtemprəri /

UK / 'tempəreri /

A2
  • adjecitve
  • Continuing for a limited time; not permanent

reason

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US / 'ri:zn /

UK / ˈrizən /

A1
  • noun
  • Ability to think about facts and form a judgment
  • Explanation for why something occurred or was done
  • verb
  • To think and make conclusions in a logical manner

too

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US / tu: /

UK / tu /

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

side

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US / saɪd /

UK / saɪd /

A1
  • adjecitve
  • In addition to the central or most important thing
  • Next to, or very close to, the right or left of
  • noun
  • Position or opinion that is opposite to another
  • Right or left part of a person's body
  • Feature of someone's personality
  • Straight edge of an object
  • One of two or more groups fighting each other
  • verb
  • To decide to agree with one point, not the other

after

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US / 'ɑ:ftə(r) /

UK / ˈæftɚ /

A1
  • adverb
  • Later than another time, or behind something
  • conjunction
  • Following something before
  • preposition
  • When an event happened or time has passed

guess

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US / ɡes /

UK / ɡɛs /

A1
  • noun
  • Answer given when you don't know if it is correct
  • verb
  • To give an answer without knowing if it is correct

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

itself

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US / ɪtˈself /

UK / ɪtˈsɛlf /

A1
  • pronoun
  • Referring to it

many

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US / 'menɪ /

UK / ˈmɛni /

A1
  • determiner
  • Used to refer a large number of things

overcome

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US / ˌəʊvə'kʌm /

UK / ˌovɚˈkʌm /

A2
  • verb
  • To succeed in a struggle against; defeat

thousand

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US / ˈθaʊznd /

UK / ˈθaʊzənd /

A1
  • number
  • Number 1,000

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

actually

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US / ˈæktʃuəli /

UK / ˈæktʃuəli /

A1
  • adverb
  • Used to add new (often different) information

folk

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US / fəʊk /

UK / fok /

A2
  • adjecitve
  • (Of ordinary people) not sophisticated
  • noun
  • Ordinary common people

write

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US / raɪt /

UK / raɪt /

A1
  • verb
  • To compose letters and words on paper or a screen
  • To invent or create a computer program
  • To create a song or piece of music

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

stick

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US / stɪk /

UK / stɪk /

A2
  • noun
  • Long thin piece of wood from a tree
  • verb
  • To push a sharp or pointed object into something
  • To join together using glue or paste
  • To remain in one place or position for a long time

certain

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US / ˈsə:tn /

UK / ˈsɚtn /

A1
  • adjecitve
  • Definite, fixed
  • Referring to an unspecified amount or quantity
  • Being sure about something; without doubt

afford

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US / ə'fɔ:d /

UK / əˈfɔrd, əˈford /

A2
  • verb
  • To make available, to provide
  • To have enough money to pay for something

ever

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US / 'evə(r) /

UK / ˈɛvɚ /

A1
  • adverb
  • At any time; at all times in the future

idaho

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US / ˈaidəhəu /

UK / ˈaɪdəˌho /

A1
  • other
  • A state in the Rocky Mountains

persist

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US / pə'sɪst /

UK / pɚˈsɪst, -ˈzɪst /

B1
  • verb
  • To continue a course of action despite opposition

point

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US / pɔɪnt /

UK / pɔɪnt /

A1
  • noun
  • An item to be discussed
  • Small spot or dot
  • Fact or detail
  • Feature of something
  • The size of the text on a page or screen
  • A certain time or stage in a process
  • Certain position in time or space
  • Idea or fact you try to convince people about
  • Measurement of scores in a game, sport
  • Sharp end of something, e.g. a pen or pin
  • verb
  • To face a certain direction, e.g. north
  • To indicate something with your finger to others

contain

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US / kənˈteɪn /

UK / kənˈten /

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

gravity

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US / ˈgrævəti /

UK / ˈɡrævɪti /

B1
  • noun
  • (Of a situation) extreme seriousness
  • Force making things fall towards the ground

inside

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US / ˌɪn'saɪd /

UK / ɪnˈsaɪd, ˈɪnˌsaɪd /

A2
  • adjecitve
  • Being in something
  • Being in a building
  • adverb
  • Into a house; indoors
  • noun
  • Inner part or surface of something

million

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US / ˈmɪljən /

UK / ˈmɪljən /

A1
  • number
  • 1,000,000

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

probably

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US / ˈprɒbəbli /

UK / ˈprɑbəbli /

A1
  • adverb
  • That is likely to happen or be true

satisfy

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US / ˈsætɪsfaɪ /

UK / ˈsætɪsˌfaɪ /

A2
  • verb
  • To make someone happy because they got their wish
  • To do what is required in order to finish

once

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US / wʌns /

UK / wʌns /

A1
  • adverb
  • One time; one instance
  • At a time in the past
  • conjunction
  • When; as soon as

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

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

result

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US / rɪ'zʌlt /

UK / rɪˈzʌlt /

A2
  • noun
  • Something produced through tests or experiments
  • Final score of a competition, election or game
  • verb
  • To be the outcome of other causes and effects

everything

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US / 'evrɪθɪŋ /

UK / ˈɛvriˌθɪŋ /

A1
  • pronoun
  • All of the things mentioned

flatten

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US / 'flætn /

UK / ˈflætn: /

B1
  • verb
  • To make level and spread out over a surface

otherwise

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US / ˈʌðəwaiz /

UK / ˈʌðɚˌwaɪz /

A2
  • adverb
  • In an additional or different way
  • Unless; or

they

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US / ðeɪ /

UK / ðe /

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

volume

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US / ˈvɒlju:m /

UK / ˈvɑljum, -jəm /

A2
  • noun
  • Number or amount of something e.g. sales
  • Amount of space that something takes up
  • One book that is part of a set of books
  • Level of sound produced by radio or television

risk

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US / rɪsk /

UK / rɪsk /

A1
  • noun
  • Actions that cause potential problems
  • verb
  • To do something potentially dangerous or foolish

very

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US / 'verɪ /

UK / ˈvɛri /

A1
  • adjecitve
  • Concerning a large degree or amount
  • adverb
  • A lot; much; many
  • Used to stress or emphasize a noun

fast

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US / fɑ:st /

UK / fæst /

A1
  • adjecitve
  • In a way that is difficult to move or change
  • Moving or able to move quickly
  • Showing time that is later than the actual time
  • adverb
  • With a great deal of speed
  • noun
  • Period of time when a person chooses not to eat
  • verb
  • To refuse food for a long time

drop

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US / drɒp /

UK / drɑp /

A1
  • noun
  • Distance between a higher and a lower level
  • Act of letting something fall (from your hand)
  • A decrease in quantity or quality; reduction
  • Tiny amount of liquid, with rounded bottom
  • verb
  • To drive someone to a place and then drive away
  • To let something fall from your hand
  • To fall or lie down quickly, as when shot
  • To decide to stop something e.g. a course)
  • To (cause to) reduce in quantity or quality

its

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US / ɪts /

UK / ɪts /

A1
  • adjecitve
  • Referring to or belonging to ‘it’
  • determiner
  • Of something; belonging or related to something
  • other
  • Possessive form of “it”

who

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US / hu: /

UK / hu /

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

top

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US / tɒp /

UK / tɑp /

A1
  • adjecitve
  • Being good or great; excellent
  • Being the most in degree or quality
  • noun
  • Item of clothing covering shoulders to waist, hips
  • A cover or lid
  • Part (e.g. road) that is the furthest away
  • Highest or upper part or point of something
  • Best or highest status or position
  • Flat upper surface or edge of an object
  • Child's toy that spins on its point
  • Upper section or leaves of fruits and vegetables
  • Winning in a sport or contest
  • verb
  • To be higher or larger than a specific value
  • To arrive at the highest point of something
  • To put a cover or layer or over something
  • To kill; murder
  • To hold the highest position on a list
  • To be more important, successful or better than
  • To beat someone or win at a game

mid

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US / mɪd /

UK / mɪd /

B2
  • adjecitve
  • At (or near) the middle point

possible

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US / ˈpɒsəbl /

UK / ˈpɑsəbəl /

A1
  • adjecitve
  • Being able or appropriate for a task or purpose
  • Having a chance of happening, or being true

paper

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US / ˈpeɪpə(r) /

UK / ˈpeɪpər /

A1
  • adjecitve
  • Not existing in reality, or done infrequently
  • Made from the material that we use to make books
  • noun
  • Academic writing or a talk on a specific topic
  • Written test
  • Newspaper
  • Pages of a book are made from this

solar

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US / 'səʊlə(r) /

UK / ˈsolɚ /

B1
  • adjecitve
  • Concerning the sun, or its heat

believe

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US / bɪ'li:v /

UK / bɪˈliv /

A1
  • verb
  • To think or accept that something is true
  • To have a particular opinion about something

bit

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US / bɪt /

UK / bɪt /

A1
  • noun
  • Device put in a horse's mouth to control it
  • Small piece of something
  • verb
  • (E.g. of fish) to take bait and be caught

display

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US / dɪˈspleɪ /

UK / dɪˈsple /

A2
  • noun
  • Arrangement of objects so people can see or buy
  • verb
  • (Animals) to indicate readiness for sex
  • To show, e.g. your feelings, thoughts; demonstrate
  • To put so they can be seen or be bought

general

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US / 'dʒenrəl /

UK / ˈdʒɛnərəl /

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

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

moon

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US / mu:n /

UK / mun /

A2
  • noun
  • Round object circling the Earth at night
  • verb
  • To expose your buttocks as a joke

nice

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US / naɪs /

UK / naɪs /

A1
  • adjecitve
  • Being attractive or of high quality or value
  • Good or enjoyable
  • Being kind or friendly

soap

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US / səʊp /

UK / sop /

A2
  • adjecitve
  • Of or from a TV serial
  • noun
  • Hard cream-like substance used to wash something
  • A TV serial
  • verb
  • To put soap on something so it can be cleaned

ago

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US / əˈgəʊ /

UK / əˈgoʊ /

A1
  • adverb
  • At a specified length of time in the past

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

yes

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US / jes /

UK / jɛs /

A1
  • adverb
  • Way to say you agree or will do something

bring

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US / brɪŋ /

UK / brɪŋ /

A1
  • verb
  • To take or go with someone to a place

room

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US / ru:m /

UK / rum, rʊm /

A1
  • noun
  • All of the people inside a particular room
  • Part of building enclosed by walls, e.g. kitchen
  • Opportunity to exist, happen, or be true
  • verb
  • To share a home with someone

slam

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US / slæm /

UK / slæm /

B1
  • noun
  • Act or sound of closing a door, etc. violently
  • verb
  • To criticize sharply
  • To shut with a lot of force, making a loud noise

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

fruit

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US / fru:t /

UK / frut /

A1
  • noun
  • Result or product of something
  • Food that grows on a tree or bush, usually sweet
  • verb
  • To grow e.g. apples, bananas, as a plant or a tree

happy

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US / ˈhæpi /

UK / ˈhæpi /

A1
  • adjecitve
  • Feeling pleasure or joy; glad

may

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US / meɪ /

UK / me /

A1
  • noun
  • 5th month of the year
  • other
  • Used to express a desire
  • Expresses permission, possibility or probability
  • Used to show that a thing could be true

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

word

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US / wɜ:d /

UK / wɚd /

A1
  • noun
  • Unit of language that has a meaning
  • Promise
  • Short remark or piece of information
  • verb
  • To express something by choosing particular words

explainer

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US / ɪksp'leɪnə /

UK / ɪksp'leɪnə /

A1
  • noun
  • Someone giving reasons or details about something

extremity

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US / ɪkˈstreməti /

UK / ɪkˈstrɛmɪti /

B1
  • noun
  • Body parts furthest from the heart (hands, feet)

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

than

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US / ðən /

UK / ðən /

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

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

rock

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US / rɒk /

UK / rɑk /

A1
  • noun
  • Type of popular music with a strong, loud beat
  • Strong, tough person who can be relied upon
  • Big stone; hard, solid substance forming mountains
  • verb
  • To be greatly upset by something, e.g. a death
  • To be extremely effective or pleasing
  • To play, sing along with, or dance to heavy music
  • To move back and forth or from side to side

turn

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US / tɜ:n /

UK / tɚn /

A1
  • noun
  • Place where changing of direction happens
  • Your time or chance to perform a duty
  • Your chance to play or do in say a game
  • Unexpected change, as in the weather
  • verb
  • To become (a particular age)
  • To become a different quality, color, etc.
  • To change the direction of something, e.g. a car
  • To move in an opposite direction or position
  • To shape metal with a spinning tool

big

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US / bɪɡ /

UK / bɪɡ /

A1
  • adjecitve
  • Popular
  • Serious
  • Large

easily

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US / ˈi:zəli /

UK / ˈizəli /

A1
  • adverb
  • Clearly; without doubt; certainly
  • Without difficulty

little

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US / 'lɪtl /

UK / ˈlɪtl /

A1
  • adjecitve
  • Being short in length of time
  • Not great in size, amount, or degree; small
  • Being very young or younger than others
  • adverb
  • By an amount or degree that is not very much
  • Not often; rarely
  • noun
  • A person's name

let

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US / let /

UK / lɛt /

A1
  • verb
  • To allow someone to do something
  • Introducing a suggestion to do something together
  • To rent a house, etc. to others

might

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US / maɪt /

UK / maɪt /

A1
  • other
  • Used to politely request an action
  • Used to express that something could happen
  • Power, strength, force or influence

natural

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US / ˈnætʃərəl /

UK / ˈnætʃərəl, ˈnætʃrəl /

A1
  • adjecitve
  • Being as one would expect; being usual or normal
  • Not made by humans; without human intervention

material

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US / məˈtɪəriəl /

UK / məˈtɪriəl /

A2
  • adjecitve
  • Relevant; (of evidence) important or significant
  • Belonging to the world of physical things
  • noun
  • Cloth; fabric
  • Supplies or data needed to do a certain thing
  • Substance from which a thing is made of

rate

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US / reɪt /

UK / ret /

A1
  • noun
  • Current price or cost of something
  • Speed or frequency of events over time
  • verb
  • To assess something or consider its qualities

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

wow

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US / waʊ /

UK / waʊ /

A1
  • exclamation
  • Sound people make when they make are impressed
  • verb
  • (Informal) to greatly impress someone

exception

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US / ɪkˈsepʃn /

UK / ɪkˈsɛpʃən /

B1
  • noun
  • Something different or not included

hungry

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US / ˈhʌŋgri /

UK / ˈhʌŋɡri /

B2
  • adjecitve
  • Feeling a need or want to eat food
  • Being eager to get or do something

runaway

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US / ˈrʌnəweɪ /

UK / ˈrʌnəˌwe /

C2
  • adjecitve
  • (Of a victory) easy; hardly contested
  • Unhappy child who runs away from home
  • noun
  • Unhappy child who runs away from home

man

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US / mæn /

UK / mæn /

A1
  • noun
  • Humans in general, including male and female
  • An adult male human being
  • Male who acts in a masculine way; not like a woman
  • verb
  • To control or operate (a machine); be in charge of
  • To operate a machine (a boat, etc.)

orbital

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US / ˈɔ:bɪtl /

UK / ˈɔrbɪtl: /

B2
  • adjecitve
  • Concerning an orbit

state

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US / steɪt /

UK / stet /

A1
  • adjecitve
  • Concerning region within a country
  • noun
  • Region within a country, with its own government
  • Situation or condition something is in
  • verb
  • To say; declare as fact

bad

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US / bæd /

UK / bæd /

A1
  • adjecitve
  • Not good; wrong
  • Lacking in good morals; evil
  • No longer fresh; spoiled

three

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US / θri: /

UK / θri /

A1
  • number
  • Number 3

surface

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US / 'sɜ:fɪs /

UK / ˈsɚfəs /

A2
  • adjecitve
  • Of the top layer; not deep or meaningful
  • noun
  • Top layer of the ground or of water
  • Nature or emotions that show, but may not be true
  • Outside or upper layer of something
  • verb
  • To give (road) a top layer
  • To appear after being hidden, unseen, or unknown
  • To come to the top of something; emerge
  • To come to the top level of water, mud, etc.

also

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US / 'ɔ:lsəʊ /

UK / ˈɔlso /

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

cube

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US / kju:b /

UK / kjub /

B2
  • noun
  • Solid object that has six square sides
  • verb
  • To cut food into the shape of small cubes
  • To multiply a number by itself three times

five

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US / faɪv /

UK / faɪv /

A1
  • number
  • 5

lover

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US / 'lʌvə(r) /

UK / ˈlʌvɚ /

A1
  • noun
  • Someone's romantic and often sexual partner
  • Someone having a great interest in something
  • Person who loves someone or is loved by someone

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)

integrity

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US / ɪnˈtegrəti /

UK / ɪnˈtɛɡrɪti /

B1
  • noun
  • Quality of being honest, fair and honorable

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

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

charon

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US / /

UK / /

A1
  • proper noun
  • An old man who ferried the souls of the dead across the Styx and Acheron Rivers to Hades.
  • The largest satellite of Pluto, discovered in 1978. Its diameter of 789 miles (1,270 km) is more tha

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

phenomenon

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US / fə'nɒmɪnən /

UK / fɪˈnɑməˌnɑn, -nən /

B1
  • noun
  • Unusual event, fact that can be studied
  • Interesting or unusual person, group
  • something that exists and can be seen, felt, tasted, etc., especially something unusual or interesti

retraction

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US / rɪˈtrækʃn /

UK / rɪˈtrækʃən /

B2
  • noun
  • Taking back of a previous statement

universe

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US / ˈju:nɪvɜ:s /

UK / ˈjunəˌvɚs /

B2
  • noun
  • All of space that contains planets and stars
  • Things surrounding a person, affecting their life

conspire

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US / kənˈspaɪə(r) /

UK / kənˈspaɪr /

B2
  • verb
  • To secretly plan with others to commit a crime

force

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US / fɔ:s /

UK / fɔrs, fors /

A1
  • noun
  • Group of persons trained for military action; army
  • Pressure; attraction
  • The use of physical strength/violence to persuade
  • verb
  • To use physical strength or violence to persuade

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

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

must

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US / məst /

UK / mʌst /

A1
  • noun
  • Something that is necessary or required
  • other
  • (Used to state that something ought to be true)
  • Used to say something is required or necessary

saturn

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US / ˈsætɜ:n /

UK / ˈsætɜ:rn /

A1
  • other
  • A giant planet that is surrounded by three planar concentric rings of ice particles; the th planet f

then

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US / ðen /

UK / ðɛn /

A1
  • adverb
  • A time that is not now
  • Following another thing in time or arrangement
  • Following on reasonably from what was just stated
  • At that time, not now

step

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US / step /

UK / stɛp /

A1
  • noun
  • Movement done as part of a particular dance
  • Distance covered by one movement of a leg; stride
  • One part or stage in a process
  • Sound made by the feet while walking; footstep
  • Flat horizontal piece that forms stairs
  • verb
  • To raise and moving the foot to put it down

dynamic

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US / daɪˈnæmɪk /

UK / daiˈnæmik /

B1
  • adjecitve
  • Always active or energetic; getting things done

fun

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US / fʌn /

UK / fʌn /

A1
  • adjecitve
  • Amusing and enjoyable
  • noun
  • Enjoyable or amusing quality or feeling

fascinating

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US / ˈfæsɪneɪtɪŋ /

UK / ˈfæsəˌnetɪŋ /

B1
  • adjecitve
  • Having your attention fixated as though by a spell
  • Very interesting
  • verb
  • To attract or interest greatly

right

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US / raɪt /

UK / raɪt /

A1
  • adjecitve
  • Correct or true
  • The south side of you looking at the rising sun
  • adverb
  • Exactly in a place or time
  • Being appropriate for a particular event
  • In a straight or direct manner
  • noun
  • Something you are legally or morally allowed to do
  • Ideal of what is just and good
  • Political view based on conservatism
  • verb
  • To fix something previously wrong or unjust
  • To make upright, as a boat that has turned over

touch

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US / tʌtʃ /

UK / tʌtʃ /

A1
  • noun
  • Certain way of doing that makes something special
  • A small amount of something
  • Feeling of a surface
  • verb
  • To affect feelings, especially by causing sympathy
  • To be next to each other with no space between
  • To get involved with (used in negative)
  • To feel an object with your fingers, etc.

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)

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

eye

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US / aɪ /

UK / aɪ /

A1
  • noun
  • The part of the body that you see with
  • The skill to see the good and bad parts of a thing
  • Hole at the end of a needle
  • verb
  • To watch or study something closely

gaseous

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US / ˈgæsiəs /

UK / ˈɡæsiəs, ˈɡæʃəs /

B2
  • adjecitve
  • Existing as or having characteristics of a gas

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

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

disc

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US / dɪsk /

UK / dɪsk /

A2
  • noun
  • Thin or flat, round object, e.g. for storing data

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

spherical

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US / ˈsferɪkl /

UK / ˈsfɪrɪkəl, ˈsfɛr- /

B1
  • adjecitve
  • Round and shaped like a ball

dimensional

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US / dɪ'menʃənəl /

UK / dɪˈmɛnʃənl: /

B1
  • adjecitve
  • Concerning how many planes an object exists in

interesting

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US / ˈɪntrəstɪŋ /

UK / ˈɪntrɪstɪŋ, -tərɪstɪŋ, -təˌrɛstɪŋ /

A1
  • adjecitve
  • Taking your attention; making you want to know
  • verb
  • To make someone want to know about something
  • To persuade to do, become involved with something

number

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US / ˈnʌmbə(r) /

UK / ˈnʌmbɚ /

A1
  • noun
  • Symbols such as 1, 2, 56, 793
  • Particular song or dance performed during a show
  • Total quantity or amount of things
  • verb
  • To put numbers on things
  • To assign a sequence within a group, series, set
  • To claim to be part of a larger group, series, set

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

case

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US / keɪs /

UK / kes /

A1
  • noun
  • Container used to carry things, e.g. clothes
  • Set of facts about a crime
  • Set of facts about an event
  • Example or instance of something
  • verb
  • To find out about a place, as in planning to steal

enough

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US / ɪˈnʌf /

UK / ɪˈnʌf /

A1
  • adjecitve
  • Sufficient to answer the need
  • adverb
  • To a satisfactory degree
  • pronoun
  • Equal to what is needed; as much as required
  • Adequate number or amount

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

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

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

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

whenever

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US / wenˈevə(r) /

UK / hwɛnˈɛvɚ /

A1
  • adverb
  • At any or every time that

own

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US / əʊn /

UK / on /

A1
  • adjecitve
  • Belong to oneself
  • determiner
  • Yours, his, hers, etc.; not belonging to another
  • pronoun
  • (Something) belong to myself
  • verb
  • To have something as your property

ultimately

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US / ˈʌltɪmətli /

UK / ˈʌltəmɪtli /

B1
  • adverb
  • Done or considered as the final and most important

bottom

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US / 'bɒtəm /

UK / ˈbɑtəm /

A2
  • adjecitve
  • Concerning the part under something, e.g. a vase
  • noun
  • The part of your body you sit on
  • Lowest position, often in a company or contest
  • Lowest part of something; part on which it rests
  • Lowest level, part or point of an object
  • The part under something, e.g. a vase
  • verb
  • To hit the lowest part of something

each

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US / i:tʃ /

UK / itʃ /

A1
  • determiner
  • Every one of two or more things
  • pronoun
  • Per one person or thing

happen

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US / 'hæpən /

UK / ˈhæpən /

A1
  • verb
  • To take place or occur

ground

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US / graʊnd /

UK / ɡraʊnd /

A1
  • noun
  • Connection of electrical equipment to earth
  • Place where people play particular sports
  • Solid surface of the earth that we stand on
  • verb
  • To break (coffee, etc.) into tiny bits with machine
  • To make loud jarring noise by pressing hard
  • To make sharp or smooth through friction
  • To press together with force making a sound
  • To punish someone by not allowing them to go out
  • To hit the bottom
  • (Of boat) to hit the bottom so it cannot move
  • To prevent a plane from taking off
  • To place the ball over the goal line in rugby

marshmallow

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US / ˌmɑ:ʃ'mæləʊ /

UK / ˈmɑrʃˌmɛlo, -ˌmælo /

B2
  • noun
  • Spongy candy made of gelatin and sugar

twice

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US / twaɪs /

UK / twaɪs /

A1
  • adverb
  • Two times

yeah

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US / jeə /

UK / ˈjɛə, ˈjæə, jɛ- /

A1
  • exclamation
  • Another way of saying 'yes'

alternate

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US / ɔ:lˈtɜ:nət /

UK / ˈɔ:ltərnət /

B2
  • verb
  • To follow one thing after another repeatedly

not

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US / nɒt /

UK / nɑt /

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

our

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US / 'aʊə(r) /

UK / aʊr /

A1
  • determiner
  • Belonging to us

whole

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US / həul /

UK / hol /

A1
  • adjecitve
  • Complete or full; all of
  • Being in a good condition
  • noun
  • Complete amount or sum; total

size

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US / saɪz /

UK / saɪz /

A1
  • noun
  • How big or small a thing is
  • Standard measurements for clothing, shoes
  • verb
  • To make something to fit a particular measurement
  • To organize or group from small to large

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

contest

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US / 'kɒntest /

UK / ˈkɑnˌtɛst /

B1
  • noun
  • Struggle or competition between rivals
  • verb
  • To struggle or compete against other people
  • To not accept an official or legal judgment

pole

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US / pəʊl /

UK / pol /

B1
  • noun
  • One of two opposite ideas, qualities or positions
  • Most northern or most southern point on a planet
  • A long, narrow piece of metal or wood
  • One of two opposite magnetic forces
  • An upright long thin structure to support things
  • verb
  • To move a boat with a stick or pole

ship

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US / ʃɪp /

UK / ʃɪp /

A1
  • noun
  • Large boat
  • verb
  • To transport goods by boat, truck or plane

telescope

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US / ˈtelɪskəʊp /

UK / ˈtelɪskoʊp /

C2
  • noun
  • Tube-shaped device used to see a great distance
  • verb
  • To shorten by compacting tubes inside each other

become

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US / bɪ'kʌm /

UK / bɪˈkʌm /

A1
  • verb
  • To begin to be; grow to be; develop into
  • To be suitable for a particular job or role

hood

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US / hʊd /

UK / hʊd /

B2
  • noun
  • Front part of the car that covers the engine
  • A head covering attached to a cape, sweater etc.

physics

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US / ˈfɪzɪks /

UK / ˈfɪzɪks /

A1
  • other
  • The study of heat, light, and energy on objects

same

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US / seɪm /

UK / sem /

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

harvest

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US / ˈhɑ:vɪst /

UK / ˈhɑ:rvɪst /

B1
  • noun
  • Gathering crops from the fields; the crops
  • The time of year to bring crops in from the fields
  • verb
  • To gather ripe crops in from the fields

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

online

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US / ˌɒnˈlaɪn /

UK / ˌɑ:nˈlaɪn /

B1
  • adjecitve
  • Connected to the internet

yet

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US / jet /

UK / jɛt /

A1
  • adverb
  • At a later time (used after ‘not’)
  • (Used to emphasize that thing is, will be greater)
  • Eventually; at a future time
  • Until now; up to the present
  • conjunction
  • Adding to what has been said, often as a contrast

cloud

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US / klaʊd /

UK / klaʊd /

A1
  • noun
  • A mass of smoke or mist hanging in the air
  • verb
  • To confuse the mind/judgment of a person
  • (Of the sky) to get darker and fill with clouds
  • To make (glass, etc.) difficult to see through
  • To make an activity less pleasant or enjoyable
  • (Of person's face, etc.) to show worry/anger

round

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US / raʊnd /

UK / raʊnd /

A1
  • adjecitve
  • Being in the shape of a circle or ball
  • Consisting of curved and not straight lines
  • Somewhat fat or curved in physical appearance
  • Being a whole number, not a fraction, decimal
  • adverb
  • From beginning to end (e.g. of the year)
  • noun
  • One of the three-minute periods in boxing
  • Drinks bought by one person for a group
  • Series regular visits, routes, or stops at places
  • Single shot or bullet fired from a gun
  • An object with a circular shape
  • One stage in a series of games, e.g. football
  • One's turn in a game such as cards
  • preposition
  • Going around
  • verb
  • To cause or make a circular or curved shape
  • To go or pass around the bend or corner
  • To change from a fraction to nearest whole number

embrace

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US / ɪm'breɪs /

UK / ɛmˈbres /

B1
  • noun
  • Act of holding someone closely
  • verb
  • To hold closely; cuddle, kiss or hug

goddess

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US / ˈgɒdes /

UK / ˈgɑ:dəs /

A2
  • noun
  • Woman worshipped because of her special powers
  • Religion supernatural being with special powers

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

definition

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US / ˌdefɪˈnɪʃn /

UK / ˌdɛfəˈnɪʃən /

A2
  • noun
  • Explanation of word's meaning, as in dictionaries
  • The sharpness of an image on a screen
  • Visual clearness in a photo or on a screen

law

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US / lɔ: /

UK / lɔ /

A1
  • noun
  • Field of study that relates to the legal profession
  • A rule made and enforced by a government
  • System or rules made by the government

planet

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US / 'plænɪt /

UK / ˈplænɪt /

A2
  • noun
  • One of the bodies that orbit the sun

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

structure

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US / ˈstrʌk.tʃə /

UK / ˈstrʌk.tʃɚ /

A2
  • noun
  • The way in which the parts of a system or object are arranged or organized, or a system arranged in
  • verb
  • To plan, organize, or arrange the parts of something

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

generally

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US / /

UK / /

A2
  • adverb
  • Usually; as a rule; by, to or for most people

life

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US / laɪf /

UK / laɪf /

A1
  • noun
  • All the living things e.g. animals, plants, humans
  • Period of time things live, from birth to death

research

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US / rɪ'sɜ:tʃ /

UK / rɪˈsɚtʃ, ˈriˌsɚtʃ /

A2
  • noun
  • Study done to discover new ideas and facts
  • Work done to find or discover knowledge
  • verb
  • To study in order to discover new ideas and facts

zero

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US / ˈzɪərəʊ /

UK / ˈzɪroʊ /

A1
  • noun
  • Temperature when water turns to ice
  • number
  • Number 0
  • verb
  • To set a scale or other device to show 0

star

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US / stɑ:(r) /

UK / stɑr /

A1
  • noun
  • Very famous person, usually an entertainer
  • Someone who does something very well
  • Your horoscope
  • A bright planet of hot gas in the night sky
  • A 5-6 sided asterisk-shape
  • verb
  • To perform or play a main role in a movie, play
  • To do something very well
  • To mark with a 5-6 sided asterisk-shape

structurally

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US / 'strʌktʃərəlɪ /

UK / 'strʌktʃərəlɪ /

B1
  • adverb
  • With respect to structure

technically

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US / ˈteknɪkli /

UK / ˈtɛknɪkl:ɪ /

A2
  • adverb
  • In an exact and particular manner

artificial

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US / ˌɑ:tɪ'fɪʃl /

UK / ˌɑrtəˈfɪʃəl /

B1
  • adjecitve
  • Dishonest, to seem fake, not sincere
  • (Something) made by people; not created by nature

extra

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US / 'ekstrə /

UK / 'ekstrə /

A2
  • adjecitve
  • More than necessary; additional
  • noun
  • Items more than you need; additional items
  • Person who has a small part in a movie
  • Special version of a newspaper

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

last

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US / lɑ:st /

UK / læst /

A1
  • adjecitve
  • Most recent; the latest
  • The one before
  • adverb
  • Final; with nothing following; after all others
  • Most recent; the latest
  • determiner
  • The one at the end
  • verb
  • To remain or continue for a certain period of time

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

tyson

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US / ˈtaɪsən /

UK / /

A1

drip

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US / drɪp /

UK / drɪp /

B1
  • verb
  • (Of liquid) to fall in drops
  • noun
  • Tiny amount of liquid that falls from something
  • Sound made by drops of liquid falling

dwarf

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US / dwɔ:f /

UK / dwɔrf /

B2
  • noun
  • Person of short stature, due to medical condition

hole

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US / həʊl /

UK / hol /

A2
  • noun
  • An empty space, as in the ground, in a sock etc.
  • Fault or weakness in a plan, idea or explanation
  • Opening into or through something
  • An awkward or difficult situation
  • Dirty or unpleasant place with poor facilities
  • verb
  • (Golf) to get the ball into the hole

moment

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US / 'məʊmənt /

UK / 'moʊmənt /

A1
  • noun
  • Very short or brief period of time
  • A particular period in time

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

structural

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US / ˈstrʌktʃərəl /

UK / ˈstrʌktʃərəl /

B1
  • adjecitve
  • Concerning or caused by structure

film

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US / fɪlm /

UK / fɪlm /

A2
  • noun
  • Thin layer that covers something
  • Movie
  • verb
  • To record moving action with a camera

hand

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US / hænd /

UK / hænd /

A1
  • noun
  • Cards given to a player in a card game
  • Piece of a clock that points to the time
  • Someone who performs physical tasks or work
  • Body part at the end of a person's arm
  • Help for someone performing a particular action
  • Condition of having power or influence
  • Member of the crew of a ship
  • verb
  • To give something to someone personally

next

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US / nekst /

UK / nɛkst /

A1
  • adverb
  • The one that follows another in time or order
  • At a time or place directly after the present one
  • noun
  • The one that follows after
  • adjecitve
  • Immediately after the previous one
  • First occurrence after the present one

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

independently

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US / ˌɪndɪ'pendəntlɪ /

UK / ˌɪndɪˈpɛndəntlɪ /

A2
  • adverb
  • In a manner being free from the control of another

hear

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US / hɪə(r) /

UK / hɪr /

A1
  • verb
  • To be aware of sound; to perceive with the ear
  • To be told or find out information or facts
  • To consider or listen to a court case

notice

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US / 'nəʊtɪs /

UK / ˈnotɪs /

A1
  • noun
  • Time by when you must leave, e.g. if you are fired
  • Paper with an announcement, e.g. pinned to a board
  • verb
  • To become aware by sight, touch, or hearing

sun

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US / sʌn /

UK / sʌn /

A1
  • noun
  • Light and heat coming from a large star in the sky
  • Hot shining star the Earth moves around
  • verb
  • To lie in the sunshine and enjoy its warmth

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

car

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US / kɑ:(r) /

UK / kɑr /

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

coalesce

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US / ˌkəʊə'les /

UK / ˌkoəˈlɛs /

C1
  • verb
  • To come to grow together as one mass

boy

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US / bɔɪ /

UK / bɔɪ /

A1
  • noun
  • A young male person

donut

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US / ˈdəuˌnʌt /

UK / ˈdoˌnʌt, -nət /

A1
  • noun
  • Piece of sweet, fried bread shaped like a ring

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

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)

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

blood

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US / blʌd /

UK / blʌd /

A2
  • adjecitve
  • Related by birth; family
  • noun
  • Red liquid in the bodies of people and animals
  • verb
  • To be initiated into something, e.g. a secret club

dude

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US / du:d /

UK / dud, djud /

B2

rapidly

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US / 'ræpɪdlɪ /

UK / ˈræpɪdlɪ /

B1
  • adverb
  • With great speed; quickly

percent

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US / pə'sent /

UK / pɚˈsɛnt /

A2
  • adverb
  • One one-hundredth of a whole; the symbol %

process

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US / prə'ses /

UK / ˈprɑsˌɛs, ˈproˌsɛs /

A2
  • noun
  • Dealing with official forms in the way required
  • Set of changes that occur slowly and naturally
  • verb
  • To organize and use data in a computer
  • To deal with official forms in the way required
  • To prepare by treating something in a certain way
  • To adopt a set of actions that produce a result
  • To convert by putting something through a machine

pigeon

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US / 'pɪdʒɪn /

UK / ˈpɪdʒən /

B2
  • noun
  • Gray bird that is common in cities

sad

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US / sæd /

UK / sæd /

A1
  • adjecitve
  • Unhappy; wishing something hadn't happened

pluto

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US / ˈpluːtəʊ /

UK / ˈpluːtoʊ /

A1
  • other
  • A small planet and the farthest known planet from the sun; it has the most elliptical orbit of all t
  • A cartoon character created by Walt Disney

trek

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US / trek /

UK / trɛk /

B1
  • noun
  • Slow or difficult journey
  • verb
  • To make your way slowly and painfully
  • To go on a difficult (often walking) journey

triangular

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US / traɪˈæŋgjələ(r) /

UK / traɪˈæŋɡjəlɚ /

B1
  • adjecitve
  • Having three straight sides
  • Having three parts

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

center

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US / 'sentə /

UK / ˈsɛntɚ /

A1
  • noun
  • Community place people go health or social reasons
  • Place in the middle of something
  • Person or thing that is attracting attention
  • verb
  • To direct focus toward something

demote

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US / ˌdi:ˈməʊt /

UK / ˌdi:ˈmoʊt /

C2
  • verb
  • To lower someone's rank, e.g. as a punishment

fall

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US / fɔ:l /

UK / fɔl /

A1
  • noun
  • Season after summer and before winter; Autumn
  • A drop in amount; decrease
  • Dropping from a standing position to the ground
  • verb
  • To drop in amount; to decrease
  • To come down from a higher position suddenly
  • To go from standing to the ground, by accident

protoplanet

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US / ˌprəʊtəʊˈplænɪt /

UK / proʊtəˈplænɪt /

A1
  • noun

scene

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US / si:n /

UK / sin /

A2
  • noun
  • Incident where someone behaves angrily, badly
  • View that looks like a picture
  • Place where something particular happened
  • Part of an act in a play

torus

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US / 'tɔ:rəs /

UK / 'tɒrəs /

A1
  • other
  • A ring-shaped surface generated by rotating a circle around an axis that does not intersect the circ
  • Commonly the lowest molding at the base of a column

bird

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US / bɜ:d /

UK / bɜ:rd /

A1
  • noun
  • Animal with feathers that uses wings to fly

another

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US / əˈnʌðə(r) /

UK / əˈnʌðɚ /

A1
  • adjecitve
  • One more, but not this
  • determiner
  • One more added
  • pronoun
  • One more (thing)

photo

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US / ˈfəʊtəʊ /

UK / ˈfoʊtoʊ /

A1
  • noun
  • Short for photograph; a picture taken by a camera

flat

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US / flæt /

UK / flæt /

A2
  • adjecitve
  • Level; even; without curves or bumps
  • Lifeless; lacking energy or vitality
  • adverb
  • In a certain, direct or absolute manner
  • Against a surface without lifting or curving away
  • noun
  • Apartment; set of rooms for living in
  • The smooth or level part of something
  • Musical tone lower than another by a small degree
  • verb
  • To share an apartment with someone

drink

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US / drɪŋk /

UK / drɪŋk /

A1
  • noun
  • A liquid that you put in your mouth
  • verb
  • To put water in your body through your mouth

early

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US / ˈɜ:li /

UK / ˈɜ:rli /

A1
  • adjecitve
  • Happening or appearing before
  • adverb
  • Coming/happening before others in a time sequence
  • Happening sooner than expected

large

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US / lɑ:dʒ /

UK / lɑ:rdʒ /

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

most

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US / məʊst /

UK / most /

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

thinker

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US / 'θɪŋkə(r) /

UK / ˈθɪŋkɚ /

A2
  • noun
  • Person studying important matters, creating ideas

essay

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US / 'eseɪ /

UK / ˈɛsˌe, ɛˈse /

B1
  • noun
  • Short piece of written opinion on a subject

from

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US / frəm /

UK / frʌm, frɑm,frəm /

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

form

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US / fɔ:m /

UK / fɔrm /

A1
  • noun
  • Sports team or person's current winning record
  • Document you complete when making an application
  • Visible shape or style; type; kind
  • verb
  • To organize something such as a club or group
  • To develop; to come into a shape or substance
  • To make something into a particular shape

hot

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US / hɒt /

UK / hɑ:t /

A1
  • adjecitve
  • Angry or excited
  • Being very good at something
  • Having a high temperature
  • Popular and causing a great deal of excitement
  • Attractive in a sexually exciting way
  • (Of food) very spicy
  • Stolen; dangerous to buy or trade in

church

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US / tʃɜ:tʃ /

UK / tʃɚtʃ /

A1
  • noun
  • Building where Christians gather and pray to God
  • An occasion of Christian religious prayer, worship

come

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US / kʌm /

UK / kʌm /

A1
  • verb
  • To arrive at a place
  • (Of mail) to be delivered
  • To move toward someone; go with someone
  • To reach a certain point or state

any

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US / 'enɪ /

UK / ˈɛni /

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

debris

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US / dəˈbri:, deɪ-, ˈdeɪˌbri: /

UK / dəˈbri, de-, ˈdeˌbri /

B2
  • noun
  • Remains of something broken or destroyed

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

haul

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US / hɔ:l /

UK / hɔl /

B2
  • verb
  • To pull or drag something heavy (e.g. boat)

think

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US / θɪŋk /

UK / θɪŋk /

A1
  • verb
  • To have an idea about something without certainty
  • To have an idea, opinion or belief about something

call

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US / kɔ:l /

UK / kɔl /

A1
  • noun
  • A order or request for action
  • The sound an animal makes, often when in danger
  • A correct prediction, e.g. a decision in a game
  • A short visit to a place or person
  • A decision by a referee or umpire in a game
  • verb
  • To make a request or order for action
  • (Animal) to make sounds to warn of danger
  • To announce the date of an election
  • To make a judgment about something
  • To give someone or something a name
  • To guess in advance the result or outcome
  • To visit a place or person for a short time
  • To phone someone
  • To speak, announce or shout in a loud voice

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

wax

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US / wæks /

UK / wæks /

B1
  • noun
  • Substance naturally produced inside the earhole
  • Soft substance that melts, used for candles
  • verb
  • (Of the moon) to get bigger, like a full circle
  • To remove body hair by applying a paste and pulling
  • To speak emotionally about a particular memory
  • To apply a greasy substance to protect a surface

reduce

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US / rɪ'dju:s /

UK / rɪˈdus, -ˈdjus /

A2
  • verb
  • To try to decrease, e.g. your weight if overweight
  • To boil a liquid until it has decreased in amount
  • To make something smaller in size, amount, level

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

droplet

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US / ˈdrɒplət /

UK / ˈdrɑ:plət /

B1
  • noun
  • Small drop

criterion

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US / kraɪ'tɪərɪən /

UK / kraɪˈtɪriən /

B1
  • noun
  • Standard used to make judgments or decisions

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

name

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US / neɪm /

UK / nem /

A1
  • noun
  • What something or someone is called
  • verb
  • To state what someone is called, e.g. John

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

galaxy

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US / 'ɡæləksɪ /

UK / ˈɡæləksi /

B2
  • noun
  • A group of stars and planets in space

until

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US / ənˈtɪl /

UK / ʌnˈtɪl /

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

join

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US / dʒɔɪn /

UK / dʒɔɪn /

A1
  • verb
  • To bring something close to another, to become one
  • To become a member of
  • To participate in an activity with others

professional

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US / prə'feʃənl /

UK / prəˈfɛʃənəl /

A2
  • adjecitve
  • Of jobs such as doctor, lawyer, accountant, etc.
  • Acting/done properly as a qualified person would
  • Getting paid for playing a sport/doing an activity
  • noun
  • Highly qualified person, e.g. lawyer or doctor
  • One who plays a sport or similar activity as a job

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

only

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US / ˈəunli /

UK / ˈonli /

A1
  • adverb
  • Just one; just that amount or thing; not more than
  • Not very important or serious
  • Just that type of thing, person
  • Short time ago; not before a certain time
  • conjunction
  • Except; but

two

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US / tu: /

UK / tu /

A1
  • number
  • 2

ten

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US / ten /

UK / tɛn /

A1
  • number
  • 10

everybody

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US / ˈevribɒdi /

UK / ˈɛvriˌbɑdi, -ˌbʌdi /

A1
  • pronoun
  • Every person; everyone

extend

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US / ɪkˈstend /

UK / ɪkˈstɛnd /

A2
  • verb
  • To offer something (help, friendship) to someone
  • To reach from one point to another
  • To straighten or stretch something out, e.g. leg
  • To make something last longer

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

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

duck

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US / dʌk /

UK / dʌk /

B1
  • noun
  • Common type of water bird
  • someone's face when their lips are pushed outwards, especially in photographs
  • verb
  • To avoid doing something that is difficult
  • To lower your head to avoid hitting something

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)

occasionally

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US / əˈkeɪʒnəli /

UK / əˈkeɪʒən(ə)li /

A2
  • adverb
  • Not very often; sometimes; seldom

thermodynamic

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US / ˌθɜ:məʊdaɪ'næmɪk /

UK / ˌθɜ:moʊdaɪ'næmɪk /

A1
  • adjecitve
  • Area of science concerned with the relationship between heat and other forms of energy

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

tension

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US / 'tenʃn /

UK / ˈtɛnʃən /

A2
  • noun
  • Feeling of anxiety and inability to relax
  • Degree to which something is stretched tight

for

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US / fə(r) /

UK / fɔr,fə /

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

liquor

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US / ˈlɪkə(r) /

UK / ˈlɪkɚ /

B2
  • noun
  • Strong alcoholic beverage

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

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)

check

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US / tʃek /

UK / tʃɛk /

A1
  • adjecitve
  • Decorated with squares made up of lines
  • noun
  • Paper showing how much you owe at a restaurant
  • Printed piece of paper you sign to pay for things
  • A mark on a form, equivalent to 'yes'; tick
  • Mark used to show that something is correct
  • Procedure to prevent errors or control something
  • verb
  • To confirm the details of something are correct
  • To leave your things with staff who look after it
  • To examine something to see if something is wrong
  • To examine in order to prevent errors/a problem

arbitrarily

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US / 'ɑ:bɪtrəlɪ /

UK / ˌɑrbəˈtrɛrəlɪ /

B1
  • adverb
  • Without using reason, often unfairly; on a whim

shoot

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US / ʃu:t /

UK / ʃut /

A2
  • noun
  • Emerging new part of a plant
  • verb
  • To kick or throw a ball at a goal
  • To fire a gun; injure or kill someone with a gun
  • To (cause to) fly away forcefully
  • To use a camera to record a film/take a photograph

object

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US / 'ɒbdʒɪkt /

UK / ˈɑbdʒɪkt /

A2
  • noun
  • Something you can see or touch, but is not alive
  • Goal or purpose of a particular plan or activity
  • The thing that the action of a verb acts upon
  • verb
  • To disagree; to protest against an idea or plan

mass

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US / mæs /

UK / mæs /

B1
  • noun
  • Religious ceremony in some Christian churches
  • Large amount or number of something
  • Main or largest part of something
  • Large number of people considered as a whole
  • Amount of matter that an object has
  • verb
  • To gather people or things into a large group

rich

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US / rɪtʃ /

UK / rɪtʃ /

A1
  • adjecitve
  • Having a lot of money or valuable possessions
  • Containing a lot of exciting events or experiences and therefore very interesting
  • (of a color, sound, smell, etc.) Pleasantly deep or strong
  • If food is rich, it contains a large amount of oil, butter, eggs, or cream.

warm

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US / wɔ:m /

UK / wɔrm /

A1
  • adjecitve
  • Friendly, sincere and kind to others
  • Being friendly or sincere
  • Slightly hot; not very hot
  • verb
  • To become more friendly or to like something
  • To make something hotter

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

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

black

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US / blæk /

UK / blæk /

A1
  • adjecitve
  • Color of the sky on a dark night
  • noun
  • A person with dark skin, often of African origin
  • Person's name
  • verb
  • To fill in something to make it a very dark color

amount

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US / ə'maʊnt /

UK / əˈmaʊnt /

A1
  • noun
  • Quantity of something
  • verb
  • To add up to a certain figure

flare

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US / fleə(r) /

UK / flɛr /

B2
  • noun
  • A brief bright light
  • Light/fire used to signal for help/warn of danger
  • Part of an object that spreads or becomes wider
  • verb
  • To become angry or excited suddenly
  • To burn or shine suddenly and briefly
  • To spread something or make something wider

determine

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US / dɪ'tɜ:mɪn /

UK / dɪˈtɚmɪn /

A2
  • verb
  • To control exactly how something will be or act
  • To establish the facts about; discover

difference

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US / 'dɪfrəns /

UK / ˈdɪfərəns, ˈdɪfrəns /

A1
  • noun
  • A thing or issue that people do not agree about
  • Not of the same kind; unlike other things

never

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US / 'nevə(r) /

UK / ˈnɛvɚ /

A1
  • adverb
  • Not ever; not at any time

period

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US / ˈpɪəriəd /

UK / ˈpɪriəd /

A1
  • noun
  • Set amount of time during which events take place
  • A way to emphasize what you will say
  • A full stop (.), marking the end of a sentence
  • A menstrual cycle
  • A set time for a class to be held

shall

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US / ʃəl /

UK / ʃæl /

A2
  • other
  • Expressing the future tense, to expect to happen
  • (Used to say something is required or commanded)
  • (Used to make a suggestion or ask a question)

spew

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US / spju: /

UK / spju /

C1
  • verb
  • To come out or push out with force

bubble

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US / ˈbʌbl /

UK / ˈbʌbəl /

B1
  • noun
  • A small ball of air inside of a liquid
  • verb
  • (Of a liquid) to produce bubbles, as when boiling
  • To show intense emotion, e.g. excitement, anger

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

fact

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US / fækt /

UK / fækt /

A1
  • noun
  • Something that is known or proved to be true

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

mike

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US / maɪk /

UK / maɪk /

A1
  • intransitive verb
  • Idle away one's time.
  • noun
  • A microphone.
  • A period of idleness.
  • A code word representing the letter M, used in radio communication.
  • transitive verb
  • Place a microphone close to (someone or something) or in (a place)

ocean

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US / 'əʊʃn /

UK / ˈoʃən /

A2
  • noun
  • Large body of salt water; a large sea

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

hour

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US / 'aʊə(r) /

UK / aʊr /

A1
  • noun
  • 60 minutes
  • Particular time of the day
  • Fixed, regularly occurring time

puff

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US / pʌf /

UK / pʌf /

B1
  • noun
  • Sweet baked food filled with cream or jam
  • Small cloud of air/smoke that can be seen or felt
  • verb
  • To breath in and out quickly
  • To produce a small cloud of smoke, steam etc.
  • To breath smoke from a pipe, etc. in and out

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

pop

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US / pɒp /

UK / pɑp /

B2
  • adjecitve
  • Type of music or art popular with many people
  • noun
  • Sweet soda drink
  • verb
  • To cause something to open or burst suddenly
  • To go to or in a place for a brief period of time

possibly

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US / ˈpɒsəbli /

UK / ˈpɑ:səbli /

A1
  • adverb
  • May be true or likely, but is uncertain

stuff

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US / stʌf /

UK / stʌf /

A1
  • noun
  • Generic description for things, materials, objects
  • verb
  • To push material inside something, with force
  • Subtitles section
  • You look around the universe, round is a thing.
  • Unless, of course, you are a, how shall we say, an alternate thinker.
  • Someone who likes to embrace the unusual.
  • Something with the word flat in it.
  • Yeah, you like discs.
  • You believe in discs.
  • When I use the word round, I'm referring to basically something that's spherical.
  • Because technically a circle is round, but if you say circle, there are no circles in the universe.
  • Everything has a shape.
  • They're three dimensional.
  • Even a black hole isn't a circle.
  • Yeah, that's right, it's spherical.
  • But the point is, in the universe, forces conspire to make round things.
  • So, let's start with soap bubbles.
  • I mean, when we're talking about the universe, why not?
  • Why not?
  • Yeah, that's, no.
  • When was the last time you saw a triangular soap bubble?
  • Never, okay, no.
  • I'm sad now, I'm very sad, because I've never seen a triangular soap bubble.
  • Or a cube.
  • Or a cube, and now I want to see both of those so bad, I don't know what to do.
  • In a soap bubble, you have this film.
  • Right.
  • And the film wants to be as small as possible.
  • Okay.
  • Now if there's any part of the film that's sticking out, it says to itself, I can make it smaller than that.
  • So all parts of the film wanna make the whole structure as small as possible.
  • And there's only one shape that accommodates that, and that's a sphere.
  • Now here's what's interesting.
  • For a given amount of material, surface, the shape that contains the largest volume
  • is a sphere.
  • Okay, got you.
  • I see what you're saying.
  • That's an interesting fact.
  • Okay.
  • Okay.
  • So if you have a nice spherical fruit, okay.
  • I'm hungry now.
  • If you make that any other shape, it's gonna bust out the side.
  • I know that because I have stepped on many oranges.
  • Why doesn't the orange just, no, no.
  • It just, right out the side.
  • Right out the side.
  • Exactly.
  • Okay.
  • This thing with spheres, what it also does is brings
  • the material inside of it as close to itself as it can possibly be.
  • Once you start flattening it out, the parts that are farther away from other parts than they would otherwise be if it was in a sphere.
  • By the way, have you ever seen a cold pigeon?
  • I don't think I've ever seen a warm pigeon.
  • So I'm not, I don't know what the difference is.
  • If you look at birds in general, they're warm blooded.
  • How do they stay warm?
  • The bird gets as round as it possibly can.
  • Just take a look at a pigeon in the cold.
  • It is round.
  • They puff up.
  • They puff up and they're round.
  • And they're round as they can, yes.
  • That way there are no extremities at risk.
  • They've reduced how flat or extended they would otherwise be.
  • So even cold pigeons wanna be round.
  • For thermodynamic reasons.
  • Cold pigeon sounds like the worst hood liquor.
  • It's like, you know, what you drinking?
  • Worse than cold duck?
  • Yeah, worse than cold duck.
  • Oh man, I can't afford cold duck, you must be rich.
  • I'm drinking cold pigeon.
  • If you gather matter together in the universe, you can say, well, what shape will it take?
  • Well, if it's rock, the rock is happy being a rock.
  • OK.
  • Most asteroids just look like rocks.
  • True.
  • Some of them may be Idaho potatoes, but they're not spherical.
  • Right.
  • Because they don't have enough gravity to overcome the rock.
  • Right.
  • The structural integrity of the rock
  • is what's determining the shape of the asteroid.
  • Above a certain size, the gravity of all the material overcomes whatever the rock wants to do by itself.
  • And the high places, the material will fall into the low places, and this will continue until basically you have a sphere on your hands.
  • So, one of the criteria
  • for the definition of a planet is is it big enough to be a sphere?
  • Pluto satisfies that criteria.
  • Uh oh, watch out.
  • Might have to make a retraction.
  • No, there are other rules.
  • Pluto fails, but it satisfies that one.
  • Of being round.
  • On being round.
  • It has enough mass for it to structurally, because this is gravity at work.
  • Gravity says, everybody come to the center.
  • and there's only one shape that can get the most number of people as close to the center as they can possibly be, and that's a sphere.
  • Exactly.
  • Pluto's moon is even a sphere.
  • Charon.
  • Let's keep going.
  • The sun.
  • It's got bad ass gravity.
  • And it's got gas.
  • It's holding on to its gas.
  • The sun generally holds its gas.
  • Occasionally there are effluences, which we call solar flares.
  • So, well the gas, it's trying to get to the center of the sun too.
  • Everybody's trying to get to the center of the gravity.
  • The shape that results from that is a sphere.
  • Period.
  • That's all it is.
  • All right.
  • And this persists for every star, for every planet, for large non planets like Pluto.
  • You know, Pluto got demoted with this new rule, but there's an asteroid that got promoted.
  • The asteroid Ceres.
  • The largest asteroid.
  • Named for the goddess of harvest.
  • Ceres.
  • was the only spherical asteroid.
  • So it satisfied the sphere criterion, but it didn't satisfy the other two.
  • So it graduated to dwarf planet.
  • Who got demoted, others got promoted, and now they got a new family.
  • So now, the laws of surface tension help us create soap bubbles.
  • It's also what beads up liquid if you just waxed your car.
  • It wants to be a sphere.
  • So bad.
  • And every part that's not touching the car is round.
  • All right exactly all right if you dripped liquid in zero g right surface tension pop pop that into a sphere right right away straight away yeah there's a scene in star trek
  • I know what you're talking about, where they shoot.
  • They shoot the Klingons in the room.
  • And they're in zero G because they turned off the artificial gravity in the ship and the blood.
  • The blood spews out.
  • Spews out all in big droplet forms that are round.
  • Spherical blob.
  • Yeah.
  • And people after that said,
  • That's weird, they must have weird blood.
  • No, your blood would do that too in zero G. But in one G, the blood goes down and drops on the ground.
  • Now, in zero G, you can make an arbitrarily large blob of liquid.
  • unless you bring it into any kind of G at all.
  • And then the gravity overcomes the surface tension and it flattens out.
  • That's why you can't just haul a blob of water out of the ocean and put it in a display case as a sphere.
  • Earth's gravity overcomes that.
  • It's a contest of forces at all times.
  • Earth's gravity overcomes the rocks.
  • The sun's gravity overcomes the gas.
  • Everybody gets a sphere out of this.
  • So, in the universe, you have exceptions to this when you have rapidly rotating objects.
  • Guess what happens to them?
  • They flatten out.
  • They flatten out.
  • Saturn rotates once every something like ten hours.
  • Wow.
  • Saturn is big and it rotates twice as fast as we do.
  • My boys flatten.
  • Yes.
  • Ten percent flatten.
  • It's ten percent shorter pole to pole than side to side.
  • Next time you look at a photo, check that out.
  • You can notice it easily with your eyes.
  • How about the rings?
  • Are the rings rotating at the same rate as the planet, or are they rotating in the planet independently?
  • According to their own orbital physics.
  • Each one of them has their own orbital physics.
  • So why aren't they a sphere?
  • When the moon formed, because we got slammed by a protoplanet in the early universe, the early solar system, we had a ring of debris.
  • But some debris was a little larger than other debris, which means it had a little bit more gravity than the other.
  • You get a little bit more, then you get a little extra stuff.
  • Now you have even more gravity.
  • Come join me!
  • One of us, one of us.
  • So this is a runaway process.
  • So the ring coalesces to become our moon itself.
  • Wow, that's great.
  • And so you get the sphere ultimately.
  • And one of the saddest moments in my professional life was reading a research paper on the dynamics, the orbital dynamics of the particles in Saturn's rings, and they said it's a temporary phenomenon.
  • That was sad.
  • That is, that means Saturn's gonna lose its rings.
  • Yes, and that it probably didn't have its rings ten million years ago, which meant the dinosaurs, if they had telescopes and looked at the Saturn, it would have had no rings.
  • Look at that.
  • That's sad.
  • That is sad.
  • That's sad.
  • So I wrote a whole essay
  • Twenty five years ago called On Being Round.
  • On Being Round.
  • I think it's online, too.
  • Nice.
  • On Being Round and Tyson.
  • Church de Grasse, just in case Mike Tyson did something round.
  • Nice.
  • Or you just heard this, so you don't even need to read it.
  • Exactly.
  • It's a two thousand word essay.
  • And for all of you disc lovers, you flat disc lovers, there you go.
  • This is why, you know, what you believe is stupid.
  • Oh, the flat Earth folks.
  • Yeah.
  • So, and our galaxy is very flat, okay?
  • When it formed, the material falling from the top and the bottom was gaseous.
  • It stuck together.
  • in the mid plane and then form stars there.
  • Because gas clouds don't have it, they stick together like hot marshmallows touching in mid air.
  • So whenever you find something that's not a sphere, there's a fascinating reason why that's the case.
  • But the natural state of the universe is, and black holes, non rotating black holes, if you want to rotate it, it will flatten out as rotating things do, and you'll get like a torus or a donut.
  • So rapidly rotating black holes are actually donuts.
  • Which are still kind of round.
  • Yeah, exactly.
  • In their own way.
  • Yeah.
  • Yeah.
  • All right, dude.
  • That was fun.
  • Okay.
  • On being round.
  • Being round.
  • Yet another explainer.