WordWeb Online

1. Not tied
   - unfastened
    
2. With laces not tied
   "teenagers slopping around in untied sneakers"
   - unlaced
    
3. Not bound by shackles and chains
   - unchained, unfettered, unshackled

1. Undo the ties of
   "They untied the prisoner"
   - unbrace, unlace
    
2. Cause to become loose
   "untie the knot"
   - undo, loosen

See also: unbound, untier, untying

Type of: alter, change, modify, undo

Antonym: tie, tied