undo
un‧do /ʌnˈduː/
verb (past tense undid /-ˈdɪd/, past participle undone /-ˈdʌn/, third person singular undoes /-ˈdʌz/) [transitive]
The screws can be undone by hand.
I undid the package carefully.
undo your jacket/shirt/bra etc
He undid his coat.
2. to 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.
3. technical to remove the effect of your previous action on a computer
un‧do /ʌnˈduː/
verb (past tense undid /-ˈdɪd/, past participle undone /-ˈdʌn/, third person singular undoes /-ˈdʌz/) [transitive] Word Family: verb: do, outdo, overdo, redo, undo; noun: deed ≠ misdeed, do, doing; adjective: done, overdone, undone
1. to open something that is tied, fastened, or wrapped: undo your jacket/shirt/bra etc
2. to try to remove the bad effects of something you have done:
3. technical to remove the effect of your previous action on a computer