Synonyms of undo in English:

undo


See definition of undo

verb

1‘Gerald undid another button of his waistcoat’

SYNONYMS
unfasten, unbutton, unhook, untie, unlace
unbind, unfetter, unshackle, unmanacle, unbridle, unlock, unbolt, uncouple, unhitch, unlink, unclick, loosen, loose, disentangle, disentwine, extricate, release, detach, free, set free, liberate, open, unseal, unwrap, let out
disconnect, disjoin, disengage, disunite, separate
ANTONYMS

fasten, do up

2‘the British government has just refused to undo a decision by the law lords’

SYNONYMS
revoke, overrule, overturn, repeal, rescind, reverse, retract, take back, rule against, disallow, veto, countermand, cancel, annul, nullify, render null and void, invalidate, render invalid, negate, abrogate, disestablish, make ineffective, set aside, do away with, wipe out, bring to an end
avoid, vacate
archaic recall
rare disannul
ANTONYMS

ratify

3‘the action of one individual can undo much of the good work done by others’

SYNONYMS
ruin, undermine, put an end to, put at risk, subvert, overturn, topple, scupper, scotch, sabotage, spoil, mess up, make a mess of, quash, squelch, crush, harm, cripple, impair, mar, destroy, devastate, play havoc with, wreck, smash, shatter, annihilate, eradicate, obliterate, defeat
cancel out, neutralize, render ineffective
thwart, upset, foil, frustrate, hamper, hinder, obstruct
informal botch, blow, put the kibosh on, foul up, muck up, louse up, blow a hole in, do for
British informal cock up, throw a spanner in the works of
North American informal rain on someone's parade, throw a monkey wrench in the works of
vulgar slang bugger up, fuck up, balls up
archaic bring to naught
ANTONYMS

further, enhance, help