impugn Synonyms

call in question refute question query oppose miscall malign libel knock impute impeach gainsay doubt revile slam slander cast doubt on bad-mouth call into question badmouth pick apart run down criticize vilify traverse traduce traducing slur dispute disprove disparage challenge censure calumniate blast blame besmirch belittle belie beath attack assail arraign charge condemn contest discredit disacknowledge deny denounce