alcohol
US /ˈælkəˌhɔl,-ˌhɑl/
UK /'ælkəhɒl/
- Uncountable Noun
- A colorless liquid that can catch fire (C2H5OH)
- Drinks such as wine, whiskey, beer
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
A2TOEICMoreby itself
US /baɪ ɪtˈsɛlf/
UK /bai itˈself/
- Adverb
- Alone; without help or assistance.
- Without any external influence or aid.
A2Morecarbon
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
A2Morechlorine
US /ˈklɔːrˌiːn/
UK /ˈklɔ:ri:n/
- Uncountable Noun
- Greenish-yellow gas with a strong smell
B2Morecontact
US /ˈkɑnˌtækt/
UK /'kɒntækt/
- Adjective
- Touching or feeling something
- Noun (Countable/Uncountable)
- Touching or feeling something
- Object that allows electricity to run through it
A2Morecouple
US /ˈkʌpəl/
UK /'kʌpl/
- Transitive Verb
- To join something to something else
- (Two animals) to engage in sexual relations
- Noun (Countable/Uncountable)
- Two people in a romantic relationship
- Two of something; two people; a pair
A2Moredirection
US /dɪˈrɛkʃən, daɪ-/
UK /də'rekʃn/
- Noun (Countable/Uncountable)
- When someone tells people what to do
- Describes the way you are going, e.g. North
A2TOEICMoredomain
US /doʊˈmeɪn/
UK /dəˈmeɪn/
- Noun (Countable/Uncountable)
- A field of knowledge, thought or influence
- Area that a ruler or government controls
B1Moredump
US /dʌmp/
UK /dʌmp/
- Transitive Verb
- To end a romantic relationship
- To put something somewhere without care
- Noun
- A place where waste or garbage is left.
- A copy of data from one part of a computer system to another.
B1Moreedge
US /ɛdʒ/
UK /edʒ/
- Noun (Countable/Uncountable)
- An advantage you have over others
- Cutting side of a sharp object
- Transitive Verb
- To cut something to make the blade sharp
- To go around the boundary of something
A2TOEICMoreelectron
US /ɪˈlektrɑ:n/
UK /ɪˈlektrɒn/
- Countable Noun
- A negatively charged particle
B2Moreformal
US / ˈfɔrməl/
UK /'fɔ:ml/
- Adjective
- Observing rules and procedures strictly
- Behaving well, politely; wearing your best clothes
A2TOEICMoregenerate
US /ˈdʒɛnəˌret/
UK /ˈdʒenəreɪt/
- Transitive Verb
- To create or be produced or bring into existence
- To create electricity, heat, energy and power
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.
A1Moregoing on
US /ˈɡoɪŋ ɑn/
UK /ˈgəʊɪŋ ɔn/
- Phrasal Verb
- To continue doing something
- To happen (usually negative)
A1Moreintermediate
US /ˌɪntɚˈmidiɪt/
UK /ˌɪntəˈmi:diət/
- Adjective
- Between; in the middle; moderate
- Having some knowledge but not advanced
- Noun (Countable/Uncountable)
- Person with some knowledge but not advanced
- Something that comes between two things in time, place, character, etc.
B1Morelobe
US /loʊb/
UK /ləʊb/
- Noun (Countable/Uncountable)
- Round part in body, e.g. some parts of brain
- part of an organ(e.g. the brain, lungs, or liver) that seems to be separate in some way from the rest
B2Morelocation
US /loʊˈkeɪʃn/
UK /ləʊˈkeɪʃn/
- Noun (Countable/Uncountable)
- Particular position or area of place, event, etc.
- A place away from a studio where film or television shots are made.
B1TOEICMorelook at
US /lʊk æt/
UK /luk æt/
- Phrasal Verb
- To use your eyes to focus on something
- To focus your eyes on something carefully
A1Moremechanism
US /ˈmɛkəˌnɪzəm/
UK /'mekənɪzəm/
- Noun (Countable/Uncountable)
- Part of a machine that performs a certain function
- System or process for achieving a certain result
B1Moremindful
US /ˈmaɪndfəl/
UK /ˈmaɪndfl/
- Adjective
- Bearing in mind; attentive to
B1Moremixture
US /ˈmɪkstʃɚ/
UK /ˈmɪkstʃə(r)/
- Noun (Countable/Uncountable)
- Something made by combining two or more things
B1Moremolecular
US /məˈlɛkjəlɚ/
UK /mə'lekjələ(r)/
- Adjective
- About or caused by molecules
B2Moremolecule
US /ˈmɑlɪˌkjul/
UK /ˈmɒlɪkju:l/
- Noun
- Two or more atoms chemically combined
B2Moreoccur
US /əˈkɚ/
UK /əˈkɜ:(r)/
- Intransitive Verb
- To come to pass or to happen
- To be found to exist; to be present.
A2TOEICMoreorbital
US /ˈɔrbɪtl:/
UK /ˈɔ:bɪtl/
- Adjective
- Concerning an orbit
B2Moreperpendicular
US /ˌpə:pənˈdɪkjəlɚ/
UK /ˌpɜ:pənˈdɪkjələ(r)/
- Adjective
- Being at right angles to a given line or plane
- In a straight up and down direction; vertical.
- Noun
- A line at right angles to a given line, plane, or surface.
C1Morepositive
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
A2Moreprior
US /ˈpraɪɚ/
UK /'praɪə(r)/
- Adjective
- Existing or coming earlier in time
- (Of a claim, etc.) more important than another one
- Noun
- Monk or priest in charge of a monastery
B1TOEICMoreprior to
US /ˈpraɪɚ tu/
UK /ˈpraiə tu:/
- Preposition
- Before a particular time or event.
C1Moreproton
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
A2Moreremain
US /rɪˈmen/
UK /rɪˈmeɪn/
- Intransitive Verb
- To be left behind; to continue to exist
- To stay in a place when other people have gone
A2TOEICMoreresult
US /rɪˈzʌlt/
UK /rɪ'zʌlt/
- Noun
- Something produced through tests or experiments
- Final score of a competition, election or game
- Intransitive Verb
- To be the outcome of other causes and effects
- To happen or exist as a consequence of something.
A2Moresnag
US /snæɡ/
UK /snæɡ/
- Transitive Verb
- To catch something on something sharp
- To break or hinder progress
- Noun
- Unforeseen difficulty, an obstacle
B2Moresolvent
US /ˈsɑ:lvənt/
UK /ˈsɒlvənt/
- Noun
- Substance used to dissolve or melt others
B2TOEICMorespecifically
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
B1TOEICMoresubstitution
US /ˌsʌbstɪˈtuʃən, -ˈtju-/
UK /ˌsʌbstɪ'tju:ʃn/
- Noun
- Act of replacing one person or thing to do a job
B2Moretransition
US /trænˈzɪʃən, -ˈsɪʃ-/
UK /trænˈzɪʃn/
- Noun
- Change from one state, movement, place to another
- Intransitive Verb
- To change state, movement, place, or subject
B1More
Vocabulary
- go ahead: To start an activity; start doing, working etc.
- going on: To continue doing something
- look at: To use your eyes to focus on something
- prior to: Before a particular time or event.
- by itself: Alone; without help or assistance.
- stuff: Generic description for things, materials, objects
- subscribe: To regularly pay to receive a service
- situation: Place, position or area that something is in
- basically: Used before you explain something simply, clearly
- positive: Showing agreement or support for something
- specifically: As regards a particular thing; closely related to
- molecule: Two or more atoms chemically combined
- dump: To end a romantic relationship
- bond: Rope, chain or other thing used to tie someone up
- mechanism: Part of a machine that performs a certain function
- occur: To come to pass or to happen
- state: Region within a country, with its own government
- similar: Nearly the same; alike
- remain: To be left behind; to continue to exist
- edge: An advantage you have over others
- explain: To make clear or easy to understand by describing
- direction: When someone tells people what to do
- charge: To run quickly toward someone to attack them
- contact: Touching or feeling something
- generate: To create or be produced or bring into existence
- reaction: Bodily response to a drug or something eaten
- result: Something produced through tests or experiments
- board: Surface for posting or showing information
- transition: Change from one state, movement, place to another
- couple: To join something to something else
- prior: Existing or coming earlier in time
- alcohol: A colorless liquid that can catch fire (C2H5OH)
- formal: Observing rules and procedures strictly
- leave: To go away from; depart
- intermediate: Between; in the middle; moderate
- lot: What happens to a person in life from chance; fate
- mindful: Bearing in mind; attentive to
- 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
- domain: A field of knowledge, thought or influence
- mixture: Something made by combining two or more things
- step: Movement done as part of a particular dance
- remember: To give someone a gift, e.g. birthday, wedding
- difference: A thing or issue that people do not agree about
- part: Division of a book
- understand: To know the meaning of language, what someone says
- group: Two or more musicians who play music together
- case: Container used to carry things, e.g. clothes
- perpendicular: Being at right angles to a given line or plane
- molecular: About or caused by molecules
- lobe: Round part in body, e.g. some parts of brain
- location: Particular position or area of place, event, etc.
- geometry: Mathematical study of shapes, surfaces, and space
- snag: To catch something on something sharp
- chlorine: Greenish-yellow gas with a strong smell
- substitution: Act of replacing one person or thing to do a job
- solvent: Substance used to dissolve or melt others
- proton: Tiny part of atom with positive electrical charge
- electron: A negatively charged particle
- orbital: Concerning an orbit
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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 the nitty-gritty of SN1 reactions? Professor Dave breaks down this key organic chemistry concept, explaining the two-step mechanism and the formation of carbocation intermediates. You'll get a clear understanding of how nucleophiles attack and why this can lead to racemic mixtures, perfect for boosting your chemistry knowledge!
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