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1. Oxford Dictionary

   undo

   • IPA[ʌnˈduː]

   英式

   • v.
     unfasten, untie, or loosen (something)；cancel or reverse the effects or results of (a previous action or measure)
   • n.
     a feature of a computer program that allows a user to cancel or reverse the last command executed

   • verb: undo, 3rd person present: undoes, gerund or present participle: undoing, past tense: undid, past participle: undone

2. • 釋義
   • 相關詞

   v.

   動詞

   • 1. unfasten, untie, or loosen (something) the knot was difficult to undo 同義詞 unfasten, unbutton, unhook, untie, unlace, ... 更多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反義詞 fasten, do up
   • 2. cancel or reverse the effects or results of (a previous action or measure) there wasn't any way Evelyn could undo the damage 同義詞 revoke, overrule, overturn, repeal, rescind, ... 更多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, archaicrecall, raredisannul反義詞 ratify
   • ▪ cancel (the last command executed by a computer) you can frequently undo the error if you notice it in time
   • 3. formal cause the downfall or ruin of Iago's hatred of women undoes him 同義詞 ruin, undermine, put an end to, put at risk, subvert, ... 更多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, informalbotch, blow, put the kibosh on, foul up, muck up, louse up, blow a hole in, do for, cock up, throw a spanner in the works of, rain on someone's parade, throw a monkey wrench in the works of, vulgar slangfuck up, bugger up, balls up, archaicbring to naught反義詞 further, enhance, help

   n.

   名詞

   • 1. a feature of a computer program that allows a user to cancel or reverse the last command executed the undo command

   undone

   • adj.
     not tied or fastened: the top few buttons of his shirt were undone

   Oxford Dictionary

   undone

   • adj.
     not tied or fastened: the top few buttons of his shirt were undone

   Oxford American Dictionary

   undoing

   • n.
     a person's ruin or downfall: he knew of his ex-partner's role in his undoing

   Oxford American Dictionary

   undoing

   • n.
     a person's ruin or downfall: he knew of his ex-partner's role in his undoing

   Oxford Dictionary

   undid

   • past of undo

   Oxford American Dictionary

   undid

   • past of undo

   Oxford Dictionary

3. • 更多解釋

   undo

   • IPA[ˌənˈdo͞o]

   美式

   • v.
     unfasten, untie, or loosen (something): the knot was difficult to undo
   • n.
     a feature of a computer program that allows a user to cancel or reverse the last one or more ... the undo command

   Oxford American Dictionary