unstring

v. t. [ 1st pref. un- + string. ] [ 1913 Webster ]

1. To deprive of a string or strings; also, to take from a string; as, to unstring beads. [ 1913 Webster ]

2. To loosen the string or strings of; as, to unstring a harp or a bow. [ 1913 Webster ]

3. To relax the tension of; to loosen. “His garland they unstring.” Dryden. Used also figuratively; as, his nerves were unstrung by fear. [ 1913 Webster ]