Undo Undid ʌnˈduː I Previous Good Verb Bre

• to undo a button/knot/zip, etc.
• to undo a jacket/shirt, etc.
• i undid the package and took out the books.
• he undid most of the good work of the previous manager.

undo

1. to open something that is fastened, tied or wrapped
• opposite do somethingup
  https://www.oxfordlearnersdictionaries.com/definition/english/do-up
• to undo a button/knot/zip, etc.
• to undo a jacket/shirt, etc.
• I undid the package and took out the books.
2. to cancel the effect of something
• 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. to make somebody/something fail
• The team was undone by the speed and strength of their opponents.

Extra Examples

• 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

Verb Forms

• present simple I / you / we / they undo
• he / she / it undoes
• past simple undid
• past participle undone
• -ing form undoing

Word Origin

• Old English undōn (see un-, do1).