foul

adjective [-er/-est only] (UNPLEASANT)

/fɑʊl/

Definition

› extremely unpleasant: a foul odor a foul mood They were using foul language (= rude or offensive language).

(Definition of foul adjective (UNPLEASANT) from the Cambridge Academic Content Dictionary © Cambridge University Press)

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foul up (something) phrasal verb

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