impeach
B2CEFR level
50/100Rarity: uncommon
TechnicalRegister
To challenge the credibility of a witness or the reliability of their testimony.
He was impeached with his own prior inconsistent statement to the police.
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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