skittish

adjective3

1. •
   Easily scared or startled; timid.

   • The dog likes people he knows, but he is skittish around strangers.
2. •
   Difficult to manage; tricky.

   • For everybody’s family doctor was remarkably clever, and was understood to have immeasurable skill in the management and training of the most skittish or vicious diseases. — 1871
3. •
   Wanton; changeable; fickle.

   • How some men creep in skittish fortune’s hall, Whiles others play the idiots in her eyes! — 1602