Redargue refers to the act of disproving an argument or challenging a statement. There are plenty of synonyms for this verb, including dispute, contradict, oppose, refute, rebut, discredit, and challenge. Each of these words reflects the idea of questioning or contradicting an assertion in some way. For instance, we might dispute somebody's claims if we think they are mistaken or challenge them if we feel that they are being dishonest. Ultimately, the synonyms for redargue all share the same basic idea of seeking to undermine or refute an argument or statement, whether through logical reasoning, factual evidence, or personal experience.