(v.) to call into question; to attack as false to attack as false or questionable to call into question; to attack verbally to oppose or attack someone or something as false or refutable Attack the truth or integrity of. dispute the truth, validity, or honesty of (a statement or motive); call into question. \\"the father does not impugn her capacity as a good mother\\" synonyms: call into question, challenge, question, dispute, query, take issue with, impeach**. attack as false or wrong Though many initially tried to impugn Darwin\\'s theory, in scientific circles today, the is idea taken as truth. .Definition of Impugn to attack as false or questionable Examples of Impugn in a sentence The mayor leaked news of the arrest to the media to impugn his opponent\\'s character. How dare you impugn the integrity of our local councilman simply because of a Twitter rumor! When the prosecutor tried to impugn the defendant\\'s character, the defense lawyer jumped to his feet and made an objection. Everyone was shocked when the student tried to impugn his lab teacher\\'s findings. Even though I hate my ex-husband\\'s girlfriend, I never try to impugn her character in front of my children. An atheist is quick to impugn the concept of a higher power. Although I had my ticket in my hand, the annoying attendant tried to impugn my entrance into the theater. The confident politician felt no need to impugn the motives of his election challengers. Since my daughter has not passed a single math test this year, I strongly impugn her teacher\\'s instructional skills. It was the detective\\'s job to impugn all the statements made by the suspects