unfasten
verb
[ ʌnˈfɑːs(ə)n ]
• open the fastening of; undo (something).
• "Allie stands before the mirror unfastening her earrings"
Similar:
undo,
open,
detach,
disconnect,
remove,
untie,
unbutton,
unzip,
loose,
loosen,
free,
separate,
disengage,
disjoin,
uncouple,
unwrap,
unbind,
unhook,
unclick,
unlace,
unhitch,
untether,
unlock,
unbolt,