Unfasten

Pronunciation: /ˈənˈfæsən/

Unfasten (verb)

  1. To undo something that is tied, buttoned, or locked so it can be opened or removed.
  2. To loosen a strap, belt, or similar part so it no longer holds something in place.
  3. To take off a fastening that keeps two things joined, such as a knot or a latch.

Examples

  • She unfastens the button and then steps inside.
  • They unfasten the clasp carefully before lifting the lid.