abjure, assert the contrary, belie, contest, contradict, contravene, controvert, counter, cross, deny, disaffirm, disallow, disavow, disbelieve, disclaim, discredit, disown, disprove, dispute, forswear, gag on, gainsay, impugn, join issue upon, misbelieve, negate, not accept, not believe, not buy, not swallow, nullify, oppose, recant, refuse to admit, refuse to credit, refute, reject, renounce, repudiate, retract, revoke, take back, take issue with, unbelieve