(n.) The act of waiving, or not insisting on, some right, claim, or privilege.

OK abandonment abdication abeyance abjuration abjurement abolishment abolition abrogation admission allowance annulment cancel canceling cancellation cassation cessation cession charter circumscription cold storage concession consent countermand counterorder deed of release defeasance desistance discontinuance dispensation dropping out exception exemption extenuating circumstances forbearance forswearing grain of salt grant handing over hedge hedging invalidation leave liberty license limitation mental reservation modification nonexercise nullification okay patent permission permission to enter qualification quitclaim recall recantation release relinquishment renege renouncement renunciation repeal rescinding rescindment rescission reservation resignation restriction retraction reversal revocation revoke revokement salvo setting aside special case special permission special treatment specialness specification surrender suspension ticket ticket of admission vacation vacatur voidance voiding vouchsafement waiving withdrawal withdrawing write-off yielding