草木皆兵　

◎ 草木皆兵 cǎomù-jiēbīng

[every bush and tree looks like an enemy—a state of extreme nervousness,as if surrounded by enemies;apprehend danger in every sound] 《晉書·苻堅載記》:淝水之戰(zhàn),苻堅看到 東晉軍隊陣容嚴整,又遠望八公山,把山上的草木都當成晉軍,十分恐懼。后用以比喻驚慌失措、猜忌敏感的心態(tài)