unfastened
adjective
1. not closed or secured
- the car door was unfastened
- unfastened seatbelts
Similar word(s): unbarred, unbolted, unlatched, unlocked, unsecured, undone
2. affording unobstructed entrance and exit; not shut or closed
Similar word(s): ajar, open, open
3. not buttoned
Similar word(s): unbuttoned
4. not tied
Similar word(s): untied
verb
1. past participle of unfasten