undo

Từ điển Oxford Advanced Learner 8th

undo [undo undoes undid undoing undone] BrE [ʌnˈduː] NAmE [ʌnˈduː] verb (un·doesBrE [ʌnˈdʌz] ; NAmE [ʌnˈdʌz] un·didBrE [ʌnˈdɪd] ; NAmE [ʌnˈdɪd] un·doneBrE [ʌnˈdʌn] ; NAmE [ʌnˈdʌn] )
1. ~ sth 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. ~ sth 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 ~ sb/sth (formal)to make sb/sth fail
•The team was undone by the speed and strength of their opponents.
Verb forms:

Word Origin:
Old English undōn (see ↑un-, ↑do ¹).

Example Bank:
•He undid his jacket and threw it over a chair.
•I can't undo this zip— it seems to be stuck.
•It's not too late to try and undo some of the damage.
•Just select ‘Edit’ and ‘Undo’ to cancel the previous action.
•to undo the damage/harm/errors
•to undo the good work/years of endeavour/reforms

• Từ đồng nghĩa / Synonyms:
  unwrap, untie, loosen, unmake
• Từ trái nghĩa / Antonyms:
  wrap, wrap up, do, make