deny gainsay retract disavow forget negate nullify refute reject renounce repudiate veto contradict dispute disaffirm oppose challenge counter contest disprove controvert rebut explode negative debunk discredit disclaim confute invalidate refuse disapprove conceal disconfirm hide contravene question disown withhold condemn ignore belie suppress disallow quash disacknowledge break annul dismiss cancel desert revoke disagree mumble decline falsify rebuff repeal abandon spurn impugn discourage dissent neglect protest abjure confound disqualify void undermine mask query overturn doubt refrain cover repress discount secrete destroy disbelieve reverse confront reprobate reply ask distrust abrogate lose confuse null retreat disannul contend suspect leave surrender override release rescind mistrust