a.

1. 跳動的；急遽變化的
2. 神經質的；提心吊膽的[（+about）]
   We felt jumpy after she told us the house was haunted.

   在她告訴我們這屋子鬧鬼之後，我們就覺得神經兮兮的。

   I knew that something was going to happen, and I was very jumpy.

   我知道要出事了，心裡很緊張。

adj.

1. anxious and uneasy.
2. stopping and starting abruptly.