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English Lexicon

Fast

/fɑːst/
adjectiveadverbCEFR A1 (Beginner)Top #250 frequency
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Comprehensive Definitions & Senses

2 senses
As adjective
  1. 1

    Moving or capable of moving at high speed.

    "The cheetah is the fastest land animal."
As adverb
  1. 1

    In a quick manner.

    "She ran fast to catch the bus."
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Thesaurus & Semantic Spectrum

Synonyms (3)
Antonyms & Contrasting Words (1)

Linguistic Origin & Historical Etymology

Derived from Old English 'fæst', meaning firm, secure, or constant, through a historical semantic shift toward steadfast movement and eventually high speed. Cognate with Old High German 'fast' (firm, solid), the modern English meaning developed via the notion of moving 'hard' or 'firmly' in pursuit of something.

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