unfastenverb [ I or T ]
uk/ʌnˈfɑː.sən/us/ʌnˈfæs.sən/to release or open something that is fixed or closed:
I can't unfasten this button/belt.
This blouse unfastens (= can be unfastened) at the back.
Thesaurus: synonyms and related words
Unfastening and opening
- breaker
- crack
- let/set sth loose idiom
- loose
- loosen
- loosen your grip idiom
- open sb up
- pay (sth) out
- steam
- the earth/ground/floor opens idiom
- throw
- unbuckle
- uncap
- uncork
- undid
- unplug
- unroll
- unscrew
- untie
- unwind
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