oppugn

From Middle French oppugner Latin oppugno (“fight against, to attack, assail, assault, storm, besiege, war with”)

• IPA^(key): /əˈpjuːn/

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• Rhymes: -uːn

oppugn (third-person singular simple present oppugns, present participle oppugning, simple past and past participle oppugned)

1. (transitive, rare) To contradict or controvert; to oppose; to challenge or question the truth or validity of a given statement.
   • 1761 Laurence Sterne, The Life and Opinions of Tristram Shandy, Gentleman, volume III, page 180, London: R. and J. Dodsley.

     It is for the same reason, that is, because 'tis all comprehended in Slawkenbergius, that I say nothing likewise of Scroderus (Andrea) who all the world knows, set himself to oppugn Prignitz with great violence, ---- proving it in his own way, first logically, and then by a series of stubborn facts

• impugn
• pugnacious
• repugnant

• pop gun, popgun