annul

1 to balance with an equal force so as to make ineffective unfortunately, his arrogant attitude annuls the many generous favors he does for people Synonyms offset, cancel (out), compensate (for), correct, counteract, counterbalance, counterpoise, make up (for), negative, neutralizeRelated Words invalidate, negate, neuter, nullify; atone (for); outbalance, outweigh, redeem; redress, relieve, remedy; override, overrule

2 to put an end to by formal action plans to annul their short-lived, ill-advised marriage Synonyms abate, abrogate, abolish, avoid, cancel, disannul, dissolve, invalidate, negate, null, nullify, quash, repeal, rescind, roll back, strike down, vacate, voidRelated Words 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 offNear Antonyms enact, lay down, legislate; establish, found, institute; formalize, legalize, legitimate, legitimize, validate; pass, ratify; allow, approve, authorize, clear, endorse (also indorse), permit, sanction, warrant; command, decree, mandate, order, prescribe