impugn

/ˌɪmˈpjun/

to dispute the truth or validity of

impugn in a sentence

“They attempted to impugn his credibility.”

Latin impugnare to attack, assault from in- against + pugnare to fight

Related Words

refute

to prove a statement or theory wrong

rebut

to claim or prove something false

contradict

to deny the truth of a statement

gainsay

to deny or contradict a fact or statement

contest

to oppose or challenge

dispute

to argue about; question the validity of