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op·pugn

oppugn

pronunciation:
pyun
part of speech: transitive verb
inflections: oppugned, oppugning, oppugns
definition: to oppose, contradict, criticize, or call into question.
She oppugned each one of my arguments.
synonyms:
challenge, contest, contradict, controvert, dispute, impugn, oppose
similar words:
argue, assail, attack, contravene, criticize, debate, object, question, rebut, refute