UNDO


Meaning of UNDO in English

/ ʌnˈduː; NAmE / verb ( un·does / ʌnˈdʌz; NAmE / un·did / ʌnˈdɪd; NAmE / un·done / ʌnˈdʌn; NAmE /) [ vn ]

1.

to open sth that is fastened, tied or wrapped :

to undo a button / knot / zip, etc.

to undo a jacket / shirt, etc.

I undid the package and took out the books.

OPP do up

2.

to cancel the effect of sth :

He undid most of the good work of the previous manager.

It's not too late to try and undo some of the damage .

UNDO (= a command on a computer that cancels the previous action)

3.

[ usually passive ] ( formal ) to make sb/sth fail :

The team was undone by the speed and strength of their opponents.

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WORD ORIGIN

Old English undōn (see un- , do (I)).

Oxford Advanced Learner's English Dictionary.      Оксфордский английский словарь для изучающик язык на продвинутом уровне.