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English definition of “fail”

fail

verb (NOT DO)    /feɪl/
B2 [I] to not do something that you should do: [+ to infinitive] He failed to arrive on time. The club had been promised a grant from the council, but the money failed to (= did not) materialize. You couldn't fail to be (= it is impossible that you would not be) affected by the film. I'd be failing in my duty if I didn't tell you about the risks involved in the project.Failing and doing badly fail to see/understand C2 used when you do not accept something: I fail to see why you can't work on a Saturday.Unaware
(Definition of fail verb (NOT DO) from the Cambridge Advanced Learner's Dictionary & Thesaurus © Cambridge University Press)
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