from The American Heritage® Dictionary of the English Language, 4th Edition
- transitive v. To attack as false or questionable; challenge in argument: impugn a political opponent's record.
from Wiktionary, Creative Commons Attribution/Share-Alike License
- v. To assault, attack.
- v. To verbally assault, especially to argue against an opinion, motive, or action; to question the truth or validity of.
from the GNU version of the Collaborative International Dictionary of English
- transitive v. To attack by words or arguments; to contradict; to assail; to call in question; to make insinuations against; to gainsay; to oppose.
from The Century Dictionary and Cyclopedia
- To attack by words or arguments; contradict; assail; call in question; gainsay.
from WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.
- v. attack as false or wrong
Middle English impugnen, from Old French impugner, from Latin impugnāre : in-, against; see in-2 + pugnāre, to fight; see peuk- in Indo-European roots.(American Heritage® Dictionary of the English Language, Fourth Edition)
From Latin impugnō, from im- + pugnō ("fight"), from pugnus ("fist") (as in English pugilism ("fighting with fists, boxing")), from Proto-Indo-European roots. (Wiktionary)