impugn
C1CEFR level
72/100Rarity: rare
FormalRegister
General verb
To dispute the truth, validity, or honesty of something or someone.
Counsel sought to impugn the reliability of the sole witness.
Law verb
To challenge the truth, validity, or integrity of something.
Opposing counsel tried to impugn the witness's motives rather than his account.
Rarity runs from 0 (a word everyone knows) to 100 (almost never seen outside specialist or literary writing). Level is the word's real difficulty on the CEFR scale, from A1 to C2.
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