abnegation, contradiction, declension, declination, declinature, declining, denial, deprivation, disagreement, disallowance, disclaimer, disclamation, disobedience, dissent, holding back, nay, negation, negative, negative answer, nix, no, nonacceptance, noncompliance, nonconsent, nonobservance, recantation, refusal, rejection, repudiation, retention, thumbs-down, unwillingness, withholding