unfasten
unfasten — verb
1. to make something that was closed or fixed become open or loose — like undoing a
to make something that was closed or fixed become open or loose — like undoing a seatbelt or unbuttoning a shirt — or for something that is closed or fixed to become open or loose by itself.
Before getting out of the taxi, Yasmin unfastened her seatbelt and picked up her bag.
transitive: unfasten + [object] (seatbelt)
Linh carefully unfastened the tiny buttons on her baby's jacket before bath time.
The clasp on Wei's necklace unfastened during the party, and the pearl rolled under the table.
Kitchen scissors are useful for unfastening the tight plastic ties on packaging.
The buckle on Gabriel's bag had unfastened during the hike, scattering books across the trail.
- undo
broader in scope — 'undo' works for knots, zips, buttons, and even digital actions
- loosen
less complete — 'loosen' means to make less tight without necessarily fully opening
- release
more formal — 'release' is typical for catches, locks, and safety mechanisms
- unbuckle
more specific — only applies to objects closed with a buckle
文法句型
unfasten + [object]
[fastening] unfastened
come unfastened
用法筆記
Can be used both transitively (someone unfastens a fastened object) and intransitively (the fastening comes undone by itself or accidentally). The pattern 'come unfastened' is common for describing an accidental or unnoticed loosening.