abjure, assert the contrary, belie, contest, contradict, contravene, controvert, counter, cross, deny, disallow, disavow, disclaim, disown, disprove, dispute, forswear, gainsay, impugn, join issue upon, negate, negative, not accept, not admit, nullify, oppose, recant, refuse to admit, refute, renounce, repudiate, retract, revoke, take back, take issue with, traverse