形容詞 nervy:

1. being in a tense state
   同義詞：edgy, high-strung, highly strung, in suspense, jittery, jumpy, overstrung, restive, uptight
2. showing or requiring courage and contempt of danger
3. offensively bold
   同義詞：brash, cheeky

1. But why is it doctor that I am always so nervy, tense and ready to jump on anybody ...
   可是大夫，為什么我總是感到神經(jīng)質(zhì)、緊張、愛發(fā)脾氣 ...

nerv.y

adj.（形容詞）
nerv.i.er,nerv.i.est
Arrogantly impudent; brazen.
緊張不安的：傲慢無禮的；厚顏的
Showing or requiring courage and fortitude; bold.
顯出或需要有勇氣的和堅韌的；大膽的
Chiefly British Jumpy; nervous.
【多用于英國】 激動的；神經(jīng)質(zhì)的
Archaic Full of muscular force; sinewy.
【古語】 肌肉發(fā)達(dá)的；健壯的

【引伸】
nerv.iness
n.（名詞）