(n.) The act of annulling; abolition; invalidation.

abjuration abjurement abolishment abolition abrogation absolute contradiction annihilation broken home broken marriage cancel canceling cancellation cassation choking choking off contradiction contrary assertion contravention controversion counterbalancing countering countermand counterorder crossing decree of nullity defeasance denial deracination disaffirmation disallowance disavowal disclaimer disclamation disownment disproof dissolution of marriage divorce divorcement elimination eradication extermination extinction extinguishment extirpation forswearing frustration gainsaying grasswidowhood impugnment interlocutory decree invalidation liquidation negation neutralization nullification offsetting purge recall recantation refutation renege renunciation repeal repudiation rescinding rescindment rescission retractation retraction reversal revocation revoke revokement rooting out separate maintenance separation setting aside silencing snuffing out stifling strangulation suffocation suppression suspension thwarting undoing uprooting vacation vacatur vitiation voidance voiding waiver waiving withdrawal write-off