adj.松動的；緊張不安的
動詞unstring的過去式及過去分詞形式.
But his spirit was unstrung by his misfortunes. 但是他的精神并不因這種種不幸而松懈。
The incident left him unstrung and incapable of rational effort. 這一事變讓他焦慮不安，不能采取理智的措施。
