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English definition of “impugn”

impugn

verb [T] uk   /ɪmˈpjuːn/ formal us  
to cause people to doubt someone's character, qualities, or reputation by criticizing them: Are you impugning my competence as a professional designer?Damaging reputationDisapproving and criticizing
(Definition of impugn from the Cambridge Advanced Learners Dictionary & Thesaurus © Cambridge University Press)
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