certify Antonyms

decertify uncertified refute rebut predict perjure outlaw oppose invalidate gainsay forbid falsify reject repudiate take the fifth give the lie to derecognize derecognise chastize call into question debunk blow out of the water negate take over extinguish enjoin dispute contradict confute confound conceal challenge cache blackball belie ban abrogate controvert counteract demolish disprove disfranchise disenfranchise discredit disclaim disbar disavow disallow disagree deny