ldoce_346_gundoun‧do /ʌnˈduː/ ●●○ verb (past tense undid /-ˈdɪd/, past participle undone /-ˈdʌn/, third person singular undoes /-ˈdʌz/) [transitive] 🔊 🔊 1FASTEN1#TIE#to open something that is tied, fastened, or wrapped 🔊 The screws can be undone by hand. 🔊 I undid the package carefully.undo your jacket/shirt/bra etc 🔊 He undid his coat.► see thesaurus at open2IMPROVEto try to remove the bad effects of something you have done 🔊 We cannot undo the damage of a lifetime in only 30 days. 🔊 If a medicine is taken again too soon, it may undo all the good that has been done.3technical to remove the effect of your previousaction on a computer→ See Verb table
Examples from the Corpus
undo• Stelling was eventually undone by his political mistakes.• Rosie undid her necklace and put it on the bedsidetable.• Pop that unravels its own workings, undoes itself.• Marcus then undid Patrick's pyjama jacket and started to try to pull it off, then decided not to.• My fingers were so cold that I couldn't undo the buttons.• Cotton, with an assist from this public-spiritedpillar, has done his best to undo the damage caused by the hogwash.• But there is no easy way to undo the nuclearbinge of the cold war.• She undid the ribbon and let her hair fall over her shoulders.• She carefully undid the ribbons and opened the scroll.• I can't undo the string!• I wish it was possible to undo what I've done.undo the damage• Maybe there was still time to undo the damage?• There wasn't any way Evelyn could undo the damage.• Cotton, with an assist from this public-spirited pillar, has done his best to undo the damage caused by the hogwash.• We certainly can not undo the damage of a lifetime in only thirty days, Sam.• It would be a cruelhoax because City would not be able to undo the damage these young people had suffered.• Yet the government can not easily undo the damage wrought by the courts.