Language About Language — C1 Essential Words
Ten essential C1 words (Communication) with the complete apparatus: pronunciation, simple definitions, natural American examples, collocations, family, the common mistake and spoken usage — plus a 15-question practice quiz. Mark your status on every word.
jargon /ˈdʒɑːrɡən/ noun C1 Communication
Meaning: Special words and expressions used by a particular profession or group that outsiders find hard to understand.
Example: Medical jargon confuses patients.
Another example: The contract is full of legal jargon.
Collocations: legal jargon · jargon in · full of jargon
Synonyms: technical language, terminology, shop talk
Antonyms: plain English
Word family: jargon (uncountable) · jargon-filled (adj)
⚠ Common mistake: Every field mints it: doctors, lawyers, gamers, and programmers defend theirs as precision; everyone else hears fog. 'Plain English' movements exist to fight it.
🗣 In spoken American English: Meetings measure sincerity by how little of it survives translation.
Register: Formal — language essential.
proverb /ˈprɒvɜːrb/ noun C1 Communication
Meaning: A short, well-known saying that gives advice or expresses a general truth about life, passed down through generations.
Example: 'Actions speak louder than words' is a proverb.
Another example: Old proverbs teach patience.
Collocations: a proverb · an old proverb · proverbs about
Synonyms: saying, maxim, adage
Word family: proverbs (n pl) · proverbial (adj)
⚠ Common mistake: Every culture owns a shelf of them, often rhyming or balanced for memory. 'The proverbial X' means the thing everyone mentions as the classic example.
🗣 In spoken American English: Grandmothers deploy them like punctuation.
Register: Formal — language essential.
accent /ˈæksənt/ noun C1 Communication
Meaning: The way a person pronounces words, showing where they come from or their background; also emphasis on a syllable, and a mark over a letter (like é).
Example: She speaks with a Texas accent.
Another example: The accent is on the second syllable.
Collocations: with an accent · a strong accent · accent on
Synonyms: pronunciation, dialect color, stress
Word family: accents (n pl) · accented (adj) · accent (v)
⚠ Common mistake: Everyone has one — 'no accent' just means the local one. Actors train in others (dialect coaches); call centers get judged by them unfairly.
🗣 In spoken American English: Movies build characters from them at casting.
Register: Neutral — language essential.
idiom /ˈɪdiəm/ noun C1 Communication
Meaning: A fixed expression whose meaning cannot be understood from its separate words, like 'kick the bucket' (die) or 'piece of cake' (easy).
Example: 'Break the ice' is a common idiom.
Another example: Idioms make English colorful.
Collocations: an idiom · idioms like · use idioms
Synonyms: expression, figure of speech, saying
Word family: idioms (n pl) · idiomatic (adj)
⚠ Common mistake: This site has a whole section of 300 for good reason: idioms are where translation goes to die and fluency announces itself.
🗣 In spoken American English: Learning them in stories beats lists — context is their native soil.
Register: Formal — language essential.
abbreviation /əˌbriːviˈeɪʃən/ noun C1 Communication
Meaning: A short form of a word or phrase, made by using fewer letters (Dr. for Doctor, etc. for et cetera, approx. for approximately).
Example: 'Ave.' is an abbreviation of 'Avenue'.
Another example: Use the abbreviation on the form.
Collocations: an abbreviation of · abbreviation for · common abbreviations
Synonyms: short form, shortening, contraction (different!)
Word family: abbreviations (n pl) · abbreviate (v)
⚠ Common mistake: Abbreviation (letters removed) vs acronym (NASA, spoken as a word) vs contraction (don't) — forms confuse all three; this family separates them.
🗣 In spoken American English: Texting evolves new ones monthly (imo, tbh).
Register: Formal — language essential.
acronym /ˈækrənɪm/ noun C1 Communication
Meaning: A word formed from the first letters of other words and pronounced as a word itself — NASA, laser, scuba.
Example: NASA is an acronym.
Another example: ASAP began as an acronym.
Collocations: an acronym · acronym for · acronyms like
Synonyms: initialism (spoken letter by letter, e.g. FBI)
Word family: acronyms (n pl)
⚠ Common mistake: The FBI rule separates them: acronyms you SAY (NASA); initialisms you SPELL (FBI). Laser and scuba hid their acronym past so well that nobody remembers the long forms.
🗣 In spoken American English: Government and tech mint them fastest.
Register: Formal — language essential.
terminology /ˌtɜːrmɪˈnɒlədʒi/ noun C1 Communication
Meaning: The special words and phrases used in a particular subject, profession, or activity (medical terminology, legal terminology).
Example: Medical terminology takes time to learn.
Another example: The terminology of sailing is rich.
Collocations: medical terminology · terminology of · technical terminology
Synonyms: vocabulary, jargon (its complained-about twin), nomenclature
Word family: terminology (uncountable) · terminological (adj)
⚠ Common mistake: Terminology is jargon with a diploma — the same specialized words, described respectfully. Dictionaries of it exist for every trade.
🗣 In spoken American English: Mastering it is half of entering any profession.
Register: Formal — language essential.
eloquent /ˈeləkwənt/ adjective C1 Communication
Meaning: Able to speak or write beautifully, clearly, and with power to persuade and move people.
Example: She gave an eloquent speech.
Another example: His eloquent letter changed minds.
Collocations: an eloquent speech · eloquent speaker · eloquently put
Synonyms: fluent (and beautiful), expressive, persuasive
Antonyms: tongue-tied, awkward
Word family: eloquence (n) · eloquently (adv)
⚠ Common mistake: Fluency says the words work; eloquence says they soar. History's great speeches (Lincoln, King) are its monuments.
🗣 In spoken American English: Silence can be eloquent too — 'an eloquent pause' is reviewing gold.
Register: Formal — language essential.
articulate /ɑːrˈtɪkjələt/ adjective / verb C1 Communication
Meaning: Able to express ideas clearly and effectively in words; also to pronounce clearly or state an idea (verb, /ɑːrˈtɪkjəleɪt/).
Example: She is an articulate young lawyer.
Another example: He articulated the plan well.
Collocations: an articulate speaker · articulate your ideas · highly articulate
Synonyms: clear, expressive, well-spoken
Antonyms: unclear, inarticulate
Word family: articulation (n) · articulately (adv)
⚠ Common mistake: Praise for speakers and a UX word for thoughts ('articulate the problem'). Trucks are 'articulated' too (jointed) — the joint sense connects all three.
🗣 In spoken American English: Interviews reward it as much as knowledge itself.
Register: Formal — language essential.
vocabulary /vəˈkæbjələri/ noun C1 Communication
Meaning: All the words of a language, or all the words a person knows or is learning; a list of words with meanings.
Example: Reading grows your vocabulary.
Another example: This site now teaches a 2,000-word vocabulary.
Collocations: your vocabulary · a wide vocabulary · vocabulary building
Synonyms: word list, lexicon (formal), word power
Word family: vocabularies (n pl) · vocab (n — informal short)
⚠ Common mistake: Yes, it is itself in the bank — the set completes itself by naming its own subject. Active (used) vocabulary is always smaller than passive (understood) — the gap is fluency's workshop.
🗣 In spoken American English: Its growth is this entire project's scoreboard.
Register: Formal — language essential.
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