unfasten
verb- unfasten something
to open something that is fastened 解开;松开;打开 to unfasten a belt/button, etc. 解开皮带、纽扣等 Passengers are permitted to unfasten their seat belts. 乘客获准解开安全带。
Oxford Collocations DictionaryUnfasten is used with these nouns as the object:- belt
- buckle
- button
- …