UNFASTEN


Meaning of UNFASTEN in English

[verb] - to take (a fastening) apart, or to take apart the fastenings on (something)I can't unfasten this button. [T]He unfastened his belt and dropped his trousers. [T]This blouse unfastens (= can be unfastened) at the back. [I]

Cambridge English vocab.      Кембриджский английский словарь.