unstring

verb (used with object), un·strung, un·string·ing.

1. to deprive of strings: to unstring a violin.
2. to take from a string: to unstring beads.
3. to loosen the strings of: to unstring a bow.
4. to relax the tension of.
5. to relax unduly, or weaken (the nerves).
6. to weaken the nerves of.

verb -strings, -stringing or -strung (tr)

1. to remove the strings of
2. (of beads, pearls, etc) to remove or take from a string
3. to weaken or enfeeble emotionally (a person or his nerves)