unfasten

UK: ʌnˈfɑːs(ə)n | US: ʌnˈfæs(ə)n

Definition

  1. vt. to loosen or release something that is fixed or tied

  2. vt. to detach or undo (a fastening)

Structure
un <not/reverse>fasten <fix securely>
Etymology

unfasten = un<not/reverse> + fasten<fix securely>

  • un-: A prefix of Germanic origin meaning "not" or "reverse action." Here, it negates or reverses the action of "fasten."
  • fasten: Derived from Old English fæstnian ("to make firm"), from fæst ("firm, fixed"). The root implies securing or attaching something firmly.

Etymology Origin:
The word "unfasten" combines the Old English prefix un- (indicating reversal) with "fasten," which traces back to the Proto-Germanic fastaz ("firm"). The logical progression reflects the physical act of undoing a secured object—literally reversing the action of fixing.

Examples

  1. She reached back to unfasten her seatbelt.

  2. The sailor unfastened the rope from the dock.

  3. Can you unfasten this knot? It’s too tight.

  4. He unfastened the buttons of his coat.

  5. The clasp was too small to unfasten easily.