undo
🇺🇸
/ʌnˈduː/
🇬🇧
/ʌnˈduː/
to open something that is tied or closed
Please undo the knot so we can open the box.
to reverse an action or effect
If you make a mistake, you can undo it by pressing Ctrl+Z.
to cause someone or something to fail
The bad weather will undo our plans for a picnic.