Longman Dictionary of Contemporary English homepage

Date: 1300-1400
Language: Latin
Origin: impugnare, from pugnare 'to fight'

impugn

 verb
     
im‧pugn [transitive] formal
to express doubts about someone's honesty, courage, ability etc:
I did not mean to impugn her professional abilities.
Definition from the Longman Dictionary of Contemporary English
Advanced Learner's Dictionary.
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