call into question or attack the credibility of

impugn

verb|/ɪmˈpjuːn/

Challenge or call into question the validity or integrity of something

Examples

In a meeting

He impugned the research methodology during the peer review process.

Over coffee

I'm not trying to impugn your judgment, but are you sure that's the best restaurant?

Why this word

question

Impugn means to challenge the truth or validity of something, especially integrity, while question is neutral inquiry

challenge

Impugn specifically means to dispute or attack as false or questionable, while challenge is broader opposition

criticize

Impugn targets the truth or integrity of claims or character, while criticize expresses disapproval generally

Usage tip

Use when someone is casting doubt on claims, motives, or character—stronger than 'question' but less aggressive than 'attack'

Etymology

Latin — from 'impugnare' (to fight against), from 'in-' (against) + 'pugnare' (to fight)

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