Vocabulary

  • move to: To change the place where you live or work.
  • look at: To use your eyes to focus on something
  • due to: Because of; owing to
  • from scratch: From the very beginning; from nothing.
  • process: To organize and use data in a computer
  • multiple: Having or involving more than one of something
  • measure: Plan to achieve a desired result
  • desire: To wish for, hope or want something
  • component: One of the parts that something is made up of
  • absorb: To take up all attention / energy of something
  • mechanism: Part of a machine that performs a certain function
  • require: To demand that someone does something
  • refer: To talk about or write about something
  • charge: To run quickly toward someone to attack them
  • reaction: Bodily response to a drug or something eaten
  • create: To make, cause, or bring into existence
  • reflection: Sign or indication of a state or condition
  • thick: Difficult to see through, as fog
  • drop: Distance between a higher and a lower level
  • break: To create a new record e.g. running the 100m dash
  • dive: Restaurant, bar or club with a bad reputation
  • shape: The outer form of something, what it looks like
  • internal: Being or happening in the body
  • layer: One of several sheets of a material or object
  • altitude: Height of something above sea level
  • suggest: To mention something that could be done; propose
  • activate: To cause to happen; cause a chemical reaction
  • plastic: Stiff but usually flexible man-made material
  • interior: Part of country that is far from the border, coast
  • emit: To release or send out (a gas, etc.)
  • distribute: To hand out or give to people
  • explode: To express an emotion in a sudden and loud way
  • chain: To feel to be bound or tied to
  • inception: Beginning or start of (institution or business)
  • fusion: Combining various things to make something new
  • undergo: To experience or endure something (bad)
  • exterior: Outside layer or surface
  • surround: To be all the way around something
  • aluminum: Very light silvery-white metal used to make cans
  • assembly: Process of putting the parts of something together
  • step: Movement done as part of a particular dance
  • perfect: So good it cannot be improved
  • front: Behavior not showing a person's true feelings
  • set: Prepared for something; ready
  • shell: Hard outer cover of an egg, fruit, nut, or seed
  • nucleus: Center of an atom
  • fast: In a way that is difficult to move or change
  • explosion: Loud and sudden expression of emotion
  • weapon: An advantage to help win a contest or conflict
  • barometer: Any instrument that measures atmospheric pressure
  • fuse: Device connected to and making a bomb explode
  • remove: To get rid of something completely
  • insulation: Material that is used to prevent heat, etc. passing
  • suitable: Right for a particular purpose or occasion
  • travel: To go to a place that is far away
  • barren: (Of a woman) not able to have children
  • unit: One apartment in a building
  • employ: To use something for a specific task
  • radar: Radio device used to find the location of objects
  • move: To cause someone to have certain emotions
  • physicist: Person who studies and works in physics
  • generator: Machine that produces electrical power
  • concave: Hollow; curved inward
  • fission: Form of nuclear energy where particles combine
  • detonate: To trigger or start an explosion
  • trinity: Christianity union of Father, Son, and Holy Spirit
  • pallet: Flat surface used for moving, storing heavy goods
  • plutonium: Radioactive metallic element
  • aluminium: Very light silvery-white metal used to make cans
  • encase: (Of hard thing) to surround or totally envelop
  • shockwave: A wave of energy (e.g. after an earthquake)
  • barrow: Shortened form of 'wheelbarrow'
  • reflector: Thing that shines when light reflects off it
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    • absorb

      US /əbˈsɔrb, -ˈzɔrb/

      UK /əb'sɔ:b/

      • Transitive Verb
      • To take up all attention / energy of something
      • To take in a liquid; soak up
      B1TOEIC
      More
    • activate

      US /ˈæktəˌvet/

      UK /ˈæktɪveɪt/

      • Transitive Verb
      • To cause to happen; cause a chemical reaction
      • To make something start working
      B1
      More
    • altitude

      US /ˈæltɪˌtud,-ˌtjud/

      UK /'æltɪtju:d/

      • Noun
      • Height of something above sea level
      B2TOEIC
      More
    • aluminium

      US /ˌæljəˈmɪniəm/

      UK /ˌæljəˈmɪniəm/

      • Uncountable Noun
      • Very light silvery-white metal used to make cans
      B2
      More
    • aluminum

      US /ə'lju:minəm/

      UK /ə'lju:minəm/

      • Uncountable Noun
      • Very light silvery-white metal used to make cans
      B2
      More
    • assembly

      US /əˈsɛmbli/

      UK /ə'semblɪ/

      • Noun (Countable/Uncountable)
      • Process of putting the parts of something together
      • Group of people gathered for a purpose
      B1TOEIC
      More
    • barometer

      US /bəˈrɑmɪtɚ/

      UK /bəˈrɒmɪtə(r)/

      • Noun
      • Any instrument that measures atmospheric pressure
      C1TOEIC
      More
    • barren

      US /ˈbærən/

      UK /ˈbærən/

      • Adjective
      • (Of a woman) not able to have children
      • (Of land) infertile
      B2TOEIC
      More
    • barrow

      US /ˈbæroʊ/

      UK /ˈbærəʊ/

      • Noun
      • Shortened form of 'wheelbarrow'
      C1
      More
    • chain

      US /tʃen/

      UK /tʃeɪn/

      • Transitive Verb
      • To feel to be bound or tied to
      • To connect or tie with a rope made of metal links
      • Noun (Countable/Uncountable)
      • Series of events or things that are connected
      • Series of (metal) connected links or rings
      A2
      More
    • charge

      US /tʃɑrdʒ/

      UK /tʃɑ:dʒ/

      • Verb (Transitive/Intransitive)
      • To run quickly toward someone to attack them
      • To ask for money as a price for a service or goods
      • Noun (Countable/Uncountable)
      • An attack by running quickly toward someone
      • A price for a service or goods
      A2
      More
    • component

      US /kəmˈponənt/

      UK /kəmˈpəʊnənt/

      • Noun (Countable/Uncountable)
      • One of the parts that something is made up of
      • A constituent part; ingredient.
      • Adjective
      • Being a part of something
      A2
      More
    • concave

      US /kɑnˈkev, ˈkɑnˌkev/

      UK /'kɒn'keɪv/

      • Adjective
      • Hollow; curved inward
      C1
      More
    • desire

      US / dɪˈzaɪr/

      UK /dɪ'zaɪə(r)/

      • Transitive Verb
      • To wish for, hope or want something
      • Noun (Countable/Uncountable)
      • Thing that is wished for or wanted
      • A strong feeling of sexual wanting.
      A2
      More
    • detonate

      US /ˈdɛtn:ˌet/

      UK /'detəneɪt/

      • Verb (Transitive/Intransitive)
      • To trigger or start an explosion
      C1
      More
    • distribute

      US /dɪˈstrɪbjut/

      UK /dɪˈstrɪbju:t/

      • Transitive Verb
      • To hand out or give to people
      • To send products to stores to sell
      A2
      More
    • dive

      US /daɪv/

      UK /daɪv/

      • Noun (Countable/Uncountable)
      • Restaurant, bar or club with a bad reputation
      • Rapid fall through air
      • Intransitive Verb
      • To swim deep under water with an air supply
      • To rapid fall through air
      B1
      More
    • due to

      US /du tu/

      UK /dju: tu:/

      • Preposition
      • Because of; owing to
      • Adjective
      • Attributable to; caused by.
      A1
      More
    • emit

      US /ɪˈmɪt/

      UK /ɪ'mɪt/

      • Transitive Verb
      • To release or send out (a gas, etc.)
      B1
      More
    • encase

      US /ɛnˈkes/

      UK /ɪnˈkeɪs/

      • Transitive Verb
      • (Of hard thing) to surround or totally envelop
      C2
      More
    • explode

      US /ɪkˈsplod/

      UK /ɪk'spləʊd/

      • Verb (Transitive/Intransitive)
      • To express an emotion in a sudden and loud way
      • To increase in number or amount very quickly
      B1
      More
    • explosion

      US /ɪkˈsploʒən/

      UK /ɪkˈspləʊʒn/

      • Noun (Countable/Uncountable)
      • Loud and sudden expression of emotion
      • Sudden increase of something
      B1
      More
    • exterior

      US /ɪkˈstɪriɚ/

      UK /ɪkˈstɪəriə(r)/

      • Noun
      • Outside layer or surface
      • Way a person appears or seems to other people
      • Adjective
      • External; of the outside part
      B1
      More
    • fission

      US /ˈfɪʃən/

      UK /ˈfɪʃn/

      • Noun
      • Form of nuclear energy where particles combine
      C1TOEIC
      More
    • from scratch

      US /frʌm skrætʃ/

      UK /frɔm skrætʃ/

      • Phrase
      • From the very beginning; from nothing.
      • From the very beginning; using new materials rather than something that already exists.
      A1
      More
    • fuse

      US /fjuz/

      UK /fju:z/

      • Noun
      • Device connected to and making a bomb explode
      • Electrical safety device
      • Verb (Transitive/Intransitive)
      • (Metal) to become one through heat contact
      • To become combined; unite.
      B2
      More
    • fusion

      US /ˈfjuʒən/

      UK /ˈfju:ʒn/

      • Noun (Countable/Uncountable)
      • Combining various things to make something new
      • The process in which light atomic nuclei combine to form a heavier nucleus, releasing large amounts of energy.
      B2
      More
    • generator

      US /ˈdʒɛnəˌretɚ/

      UK /ˈdʒenəreɪtə(r)/

      • Noun (Countable/Uncountable)
      • Machine that produces electrical power
      • An element that can be used to generate the elements of a group or set.
      B2
      More
    • inception

      US /ɪnˈsɛpʃən/

      UK /ɪnˈsepʃn/

      • Noun
      • Beginning or start of (institution or business)
      B2
      More
    • insulation

      US /ˌɪnsəˈleɪʃn/

      UK /ˌɪnsjuˈleɪʃn/

      • Uncountable Noun
      • Material that is used to prevent heat, etc. passing
      B2
      More
    • interior

      US /ɪnˈtɪriɚ/

      UK /ɪn'tɪərɪə(r)/

      • Noun (Countable/Uncountable)
      • Part of country that is far from the border, coast
      • Remote central area of a continent
      • Adjective
      • Being the inside part of a building, car etc.
      B1TOEIC
      More
    • internal

      US /ɪnˈtɚnəl/

      UK /inˈtə:nəl/

      • Adjective
      • Being or happening in the body
      • Being, happening in a country, state, organization
      B1TOEIC
      More
    • layer

      US /ˈleɚ/

      UK /ˈleiə/

      • Noun (Countable/Uncountable)
      • One of several sheets of a material or object
      • A covering of something spread over a surface.
      • Transitive Verb
      • To put things one on top of another
      B1TOEIC
      More
    • look at

      US /lʊk æt/

      UK /luk æt/

      • Phrasal Verb
      • To use your eyes to focus on something
      • To focus your eyes on something carefully
      A1
      More
    • mechanism

      US /ˈmɛkəˌnɪzəm/

      UK /'mekənɪzəm/

      • Noun (Countable/Uncountable)
      • Part of a machine that performs a certain function
      • System or process for achieving a certain result
      B1
      More
    • move to

      US /muv tu/

      UK /mu:v tu:/

      • Phrasal Verb
      • To change the place where you live or work.
      • Verb (Transitive/Intransitive)
      • To proceed to the next stage or action.
      A2
      More
    • multiple

      US /ˈmʌltəpəl/

      UK /ˈmʌltɪpl/

      • Adjective
      • Having or involving more than one of something
      • Having or involving several parts, elements, or members.
      • Countable Noun
      • Number produced by multiplying a smaller number
      • A number of identical circuit elements connected in parallel or series.
      B1
      More
    • nucleus

      US /ˈnu:kliəs/

      UK /ˈnju:kliəs/

      • Noun
      • Center of an atom
      • Control center of a cell
      B2
      More
    • pallet

      US /ˈpælɪt/

      UK /ˈpælət/

      • Noun
      • Flat surface used for moving, storing heavy goods
      C1TOEIC
      More
    • physicist

      US /ˈfɪzɪsɪst/

      UK /ˈfɪzɪsɪst/

      • Noun
      • Person who studies and works in physics
      B2
      More
    • plastic

      US /ˈplæstɪk/

      UK /'plæstɪk/

      • Uncountable Noun
      • Stiff but usually flexible man-made material
      • Adjective
      • Being easily formed or shaped
      A2
      More
    • plutonium

      US /pluˈtoniəm/

      UK /plu:ˈtəʊniəm/

      • Uncountable Noun
      • Radioactive metallic element
      B2
      More
    • process

      US /ˈprɑsˌɛs, ˈproˌsɛs/

      UK /prə'ses/

      • Transitive Verb
      • To organize and use data in a computer
      • To deal with official forms in the way required
      • Noun (Countable/Uncountable)
      • Dealing with official forms in the way required
      • Set of changes that occur slowly and naturally
      A2TOEIC
      More
    • radar

      US /ˈredɑr/

      UK /ˈreɪdɑ:(r)/

      • Noun
      • Radio device used to find the location of objects
      B2
      More
    • reaction

      US /riˈækʃən/

      UK /rɪ'ækʃn/

      • Noun
      • Bodily response to a drug or something eaten
      • Feeling or action in response to something
      A2
      More
    • refer

      US /rɪˈfɚ/

      UK /rɪ'fɜ:(r)/

      • Verb (Transitive/Intransitive)
      • To talk about or write about something
      • To give information about something
      A2TOEIC
      More
    • reflection

      US /rɪˈflɛkʃən/

      UK /rɪˈflekʃn/

      • Noun
      • Sign or indication of a state or condition
      • Image that you see in a mirror, glass, or water
      A2TOEIC
      More
    • reflector

      US /rɪˈflɛktɚ/

      UK /rɪˈflektə(r)/

      • Noun
      • Thing that shines when light reflects off it
      C1
      More
    • require

      US /rɪˈkwaɪr/

      UK /rɪ'kwaɪə(r)/

      • Transitive Verb
      • To demand that someone does something
      • To need to do something, to make it necessary
      A2TOEIC
      More
    • shell

      US /ʃɛl/

      UK /ʃel/

      • Noun (Countable/Uncountable)
      • Hard outer cover of an egg, fruit, nut, or seed
      • Hard metal container containing a bullet
      • Transitive Verb
      • To remove the outer covering of peas, nuts etc.
      • To fire shells (weapons) at
      B1
      More
    • shockwave

      US

      UK

      • Noun
      • A wave of energy (e.g. after an earthquake)
      C2
      More
    • suitable

      US /ˈsutəbəl/

      UK /ˈsu:təbl/

      • Adjective
      • Right for a particular purpose or occasion
      • (Of clothes) appropriate for a given occasion
      A2
      More
    • surround

      US /səˈraʊnd/

      UK /səˈraʊnd/

      • Transitive Verb
      • To be all the way around something
      • To be closely connected to and have an effect on
      • Verb (Transitive/Intransitive)
      • To be closely connected to and have an effect on
      A2
      More
    • thick

      US /θɪk/

      UK /θɪk/

      • Adjective
      • Difficult to see through, as fog
      • Full of (people, etc.)
      • Adverb
      • In close association or friendship.
      A2
      More
    • trinity

      US /'trɪnətɪ/

      UK /ˈtrɪnəti/

      • Noun
      • Christianity union of Father, Son, and Holy Spirit
      B2
      More
    • undergo

      US /ˌʌndərˈgoʊ/

      UK /ˌʌndəˈgəʊ/

      • Verb (Transitive/Intransitive)
      • To experience or endure something (bad)
      • To experience a change or transformation.
      B1
      More
    • unit

      US /ˈjunɪt/

      UK /ˈju:nɪt/

      • Countable Noun
      • One apartment in a building
      • Group of people, e.g. soldiers, that work together
      B2TOEIC
      More
    • weapon

      US /ˈwɛpən/

      UK /'wepən/

      • Noun (Countable/Uncountable)
      • An advantage to help win a contest or conflict
      • Something that is used for fighting, e.g. a gun
      A2TOEIC
      More
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    01:03

    She took a brave step forward, leaving behind her comfort zone to chase her dreams.

    Vocabulary
    • brave

      adj. Having courage

    • comfort zone

      phr. A familiar situation where one feels safe

    Explanation
    a brave step is a noun phrase, where brave is an adjective modifying the noun step, meaning "a courageous step". forward is an adverb modifying step, meaning "ahead". The whole phrase serves as the object, answering the "what" of took (verb) — she took a brave step forward.

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    brave

    US/brev/
    UK/breɪv/
    adj.Brave
    v.t.To bravely face
    A2 Elementary

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    B2US
    #sphere#step#neutron#fission#weapon#plutonium

    How it Works Fat Man Oppenheimer Trinity Atomic Bomb

    0
    gullcorey posted on 2025/06/27
    Ever wondered how the 'Fat Man' atomic bomb actually worked? This video dives deep into the incredible engineering behind the implosion device, explaining components like the explosive lenses and neutron initiator with amazing 3D animations. You'll pick up some seriously advanced vocabulary while learning about a pivotal moment in history!

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