1. unfasten
verb. cause to become undone.
- fasten (English)
- fæstnian (Old English (ca. 450-1100))
- un- (English)
- on- (Middle English (1100-1500))
2. unfasten
verb. become undone or untied.
- fasten (English)
- fæstnian (Old English (ca. 450-1100))
- un- (English)
- on- (Middle English (1100-1500))