The definition of attack is to make an attempt to hurt someone or something (physically or verbally), to destroy someone or something, to impact someone or something in a dangerous manner, or to forcibly take someone or something.
To be contrary to; to oppose; to resist.
To argue or debate with (someone).
To ask questions.
To be inconsistent with; be contrary to:
To refuse to acknowledge as one's own; disown; repudiate
(Law) To refuse to abide by (a contract, agreement, etc.); repudiate
To declare support for or belief in:
challenge the accuracy, probity, or propriety of
Find another word for oppugn. In this page you can discover 17 synonyms, antonyms, idiomatic expressions, and related words for oppugn, like: attack, contend, contradict, dispute, oppose, question, resist, contravene, controvert, deny and disaffirm.