annul

invalidate, negate, neuter, nullify

atone (for)

outbalance, outweigh, redeem

redress, relieve, remedy

override, overrule

countermand, override, overrule, overturn, veto

abort, call, call off, drop, recall, retract, reverse, revoke, suspend, withdraw

ban, enjoin, forbid, outlaw, prohibit

disallow, dismiss, reject

annihilate, break down, eliminate, eradicate, erase, liquidate, remove, throw out, write off