His mind had long been t a great tension, and this shock had unstrung him.
In fact, his nerves were so unstrung that he would not be able to sleep for many hours to come.
She was sadly confused and unstrung, her thoughts awhirl and nerves ajangle.
It should be straight when unstrung, and unstrung when not in use.
But you're afraid he did, and that keeps you unstrung and unhappy.