1. (v. t.) To prove to be false or erroneous; to confute; to refute.

2. (v. t.) To disallow; to disapprove of.

abjure assert the contrary belie blow sky-high blow up break confound confute contest contradict contravene controvert counter cross deflate demolish deny destroy disaffirm disallow disavow disclaim disconfirm discredit disown dispute evert explode expose forswear gainsay impugn invalidate join issue upon negate negative not accept not admit nullify oppose overthrow overturn prove the contrary puncture rebut recant refuse to admit refute renounce repudiate retract revoke shoot show up take back take issue with traverse undercut