impugn Synonyms

call in question oppose malign libel knock impute impeach gainsay doubt dispute disprove disparage discredit question refute cast doubt on bad-mouth call into question run down criticize vilify traverse traduce slur slander slam revile disaffirm disacknowledge challenge censure calumniate blast blame besmirch belittle belie beath attack assail arraign charge condemn deny denunciate denounce denigrate defame decry cross