1) Remove 2) Remove the strings from 3) Take 4) Take away 5) To relax the tension of 6) To weaken the nerves of 7) Withdraw 
• (v. t.) Used also figuratively; as, his nerves were unstrung by fear. • (v. t.) To deprive of a string or strings; also, to take from a string; as, to unstring beads. • (v. t.) To relax the tension of; to loosen. • (v. t.) To loosen the string or strings of; as, to unstring a harp or a bow.
[v] - remove the strings from
to deprive of strings: to unstring a violin. · to take from a string: to unstring beads. · to loosen the strings of: to unstring a bow. · to relax the tension of. · to relax unduly, or weaken (the nerves). · to weaken the nerves of.