acid
US /ˈæsɪd/
UK /ˈæsɪd/
- Noun (Countable/Uncountable)
- Sour substance that reacts with metals e.g. lemon
A2Moreatom
US /ˈætəm/
UK /'ætəm/
- Noun
- Smallest bit that matter can be broken down into
B1Morebasically
US /ˈbesɪkəli,-kli/
UK /ˈbeɪsɪkli/
- Adverb
- Used before you explain something simply, clearly
- In essence; when you consider the most important aspects of something.
A2Morebond
US /bɑnd/
UK /bɒnd/
- Noun (Countable/Uncountable)
- Rope, chain or other thing used to tie someone up
- Closeness that is shared between people or groups
- Verb (Transitive/Intransitive)
- To develop a close relationship with
- To become joined or connected, e.g. using glue
A2TOEICMorecarbon
US /ˈkɑrbən/
UK /'kɑ:bən/
- Uncountable Noun
- Chemical element with an atomic number of 6
B1Morechannel
US /ˈtʃænəl/
UK /'tʃænl/
- Noun (Countable/Uncountable)
- Long hole dug in the ground, e.g. to move water
- TV or radio station or its programs
- Transitive Verb
- To dig a long hole for carrying water
- To send (e.g. money) to a certain place or person
B1Morecharge
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
A2Moredomain
US /doʊˈmeɪn/
UK /dəˈmeɪn/
- Noun (Countable/Uncountable)
- A field of knowledge, thought or influence
- Area that a ruler or government controls
B1Moreelectron
US /ɪˈlektrɑ:n/
UK /ɪˈlektrɒn/
- Countable Noun
- A negatively charged particle
B2Moreelimination
US /ɪˌlɪməˈneʃən/
UK /ɪˌlɪmɪ'neɪʃn/
- Noun (Countable/Uncountable)
- Act or process of removing or being removed
- Defeating a team to remove them from a contest
B1Moreexhibit
US /ɪɡˈzɪbɪt, ɛɡ-/
UK /ɪɡ'zɪbɪt/
- Noun (Countable/Uncountable)
- Object put on public display, e.g. in a gallery
- An object or collection of objects on public display in an art gallery or museum or at a trade fair.
- Transitive Verb
- To show something, such as an emotion
- To put object on public display, e.g. in a gallery
A2TOEICMoreflat
US /flæt/
UK /flæt/
- Noun (Countable/Uncountable)
- Apartment; set of rooms for living in
- The smooth or level part of something
- Verb (Transitive/Intransitive)
- To share an apartment with someone
- To fail to produce the intended effect; to be unsuccessful or uninteresting.
A2Moreformal
US / ˈfɔrməl/
UK /'fɔ:ml/
- Adjective
- Observing rules and procedures strictly
- Behaving well, politely; wearing your best clothes
A2TOEICMoregeometry
US /dʒiˈɑ:mətri/
UK /dʒiˈɒmətri/
- Uncountable Noun
- Mathematical study of shapes, surfaces, and space
- Mathematical shape of something
B2Morego ahead
US /ɡo əˈhɛd/
UK /ɡəu əˈhed/
- Phrasal Verb
- To start an activity; start doing, working etc.
- To give permission to do something
- Intransitive Verb
- To start or proceed with something
- To proceed despite potential obstacles or doubts.
A1Moregrab
US /ɡræb/
UK /ɡræb/
- Transitive Verb
- To take and hold something quickly
A2Morehydrogen
US /ˈhaɪdrədʒən/
UK /ˈhaɪdrədʒən/
- Uncountable Noun
- Lightest of all chemical elements
B1Moreinteract
US /ˌɪntɚˈækt/
UK /ˌɪntər'ækt/
- Intransitive Verb
- To talk or do things with each other
A2Morelook at
US /lʊk æt/
UK /luk æt/
- Phrasal Verb
- To use your eyes to focus on something
- To focus your eyes on something carefully
A1Moremolecule
US /ˈmɑlɪˌkjul/
UK /ˈmɒlɪkju:l/
- Noun
- Two or more atoms chemically combined
B2Moreoxygen
US /ˈɑksɪdʒən/
UK /'ɒksɪdʒən/
- Uncountable Noun
- A gas in the air that we need to breathe
- Oxygen administered as a medical treatment.
B1Morepi
US /paɪ/
UK /paɪ/
- Noun
- The ratio of the circumference to the diameter
B2Morepositive
US /ˈpɑzɪtɪv/
UK /ˈpɒzətɪv/
- Adjective
- Showing agreement or support for something
- Being sure about something; knowing the truth
- Noun
- A photograph in which light areas are light and dark areas are dark
A2Moreproton
US /ˈproʊtɑ:n/
UK /ˈprəʊtɒn/
- Countable Noun
- Tiny part of atom with positive electrical charge
B2Morereaction
US /riˈækʃən/
UK /rɪ'ækʃn/
- Noun
- Bodily response to a drug or something eaten
- Feeling or action in response to something
A2Morerespect
US /rɪˈspɛkt/
UK /rɪ'spekt/
- Transitive Verb
- To follow the established rules
- To think very highly of another person
- Noun
- Behavior that follows the established rules
- Regard or admiration for someone or something
A2TOEICMorescience
US /ˈsaɪəns/
UK /'saɪəns/
- Uncountable Noun
- Study of the physical world, based on facts
A2TOEICMorespecifically
US /spəˈsɪfɪkli/
UK /spəˈsɪfɪkli/
- Adverb
- As regards a particular thing; closely related to
- In a definite and clear manner.
A2Morestuff
US /stʌf/
UK /stʌf/
- Uncountable Noun
- Generic description for things, materials, objects
- Transitive Verb
- To push material inside something, with force
B1Moresubscribe
US /səbˈskraɪb/
UK /səb'skraɪb/
- Verb (Transitive/Intransitive)
- To regularly pay to receive a service
B1TOEICMoresubstrate
US /ˈsʌbˌstret/
UK /ˈsʌbstreɪt/
- Noun
- A substance which a catalyst has an effect on
B2Moresurround
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
A2Moretalking about
US
UK
- Phrasal Verb
- To discuss a particular topic.
- To be constantly mentioning or bringing up a subject.
A1Moretransition
US /trænˈzɪʃən, -ˈsɪʃ-/
UK /trænˈzɪʃn/
- Noun
- Change from one state, movement, place to another
- Intransitive Verb
- To change state, movement, place, or subject
B1Morewith respect to
US /wɪð rɪˈspɛkt tu/
UK /wið risˈpekt tu:/
- Preposition
- In relation to; regarding.
- Phrase
- In relation to; concerning.
A1More
Vocabulary
- talking about: To discuss a particular topic.
- look at: To use your eyes to focus on something
- with respect to: In relation to; regarding.
- go ahead: To start an activity; start doing, working etc.
- stuff: Generic description for things, materials, objects
- subscribe: To regularly pay to receive a service
- grab: To take and hold something quickly
- basically: Used before you explain something simply, clearly
- positive: Showing agreement or support for something
- specifically: As regards a particular thing; closely related to
- expect: To believe something is probably going to happen
- interact: To talk or do things with each other
- molecule: Two or more atoms chemically combined
- bond: Rope, chain or other thing used to tie someone up
- flat: Apartment; set of rooms for living in
- state: Region within a country, with its own government
- explain: To make clear or easy to understand by describing
- form: Sports team or person's current winning record
- charge: To run quickly toward someone to attack them
- reaction: Bodily response to a drug or something eaten
- board: Surface for posting or showing information
- transition: Change from one state, movement, place to another
- respect: To follow the established rules
- oxygen: A gas in the air that we need to breathe
- exhibit: Object put on public display, e.g. in a gallery
- formal: Observing rules and procedures strictly
- leave: To go away from; depart
- lot: What happens to a person in life from chance; fate
- carbon: Chemical element with an atomic number of 6
- channel: Long hole dug in the ground, e.g. to move water
- important: Having power or authority
- science: Study of the physical world, based on facts
- domain: A field of knowledge, thought or influence
- continue: To do something without stopping, or after pausing
- acid: Sour substance that reacts with metals e.g. lemon
- hydrogen: Lightest of all chemical elements
- surround: To be all the way around something
- step: Movement done as part of a particular dance
- product: Item that can be bought
- understand: To know the meaning of language, what someone says
- atom: Smallest bit that matter can be broken down into
- group: Two or more musicians who play music together
- case: Container used to carry things, e.g. clothes
- feel: To be aware of or experience an emotion, sensation
- geometry: Mathematical study of shapes, surfaces, and space
- elimination: Act or process of removing or being removed
- proton: Tiny part of atom with positive electrical charge
- electron: A negatively charged particle
- substrate: A substance which a catalyst has an effect on
- pi: The ratio of the circumference to the diameter
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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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Ken Lee posted on 2026/08/25Ever wondered about elimination reactions? Professor Dave breaks down the E1 reaction, explaining how it's similar to SN1 reactions and how the leaving group leaves to form a carbocation. You'll get a clear look at the geometry changes and how even weak nucleophiles can react, picking up key chemistry terms along the way!
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