語彙. Single words or set phrases that must be learned in order to communicate.
The sum of the individual words or set phrases that a speaker knows is their entire "vocabulary". A "vocabulary word" or a "word in one's vocabulary" is a certain word that that person knows in a given language. When studying a foreign language, new vocabulary is often learned in lists arranged by topic or relative difficulty.
Questions with this tag should include questions about word definitions (such as comparing the meaning of certain words), and clarifying the specific usage of vocabulary words.
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