- unnerved - deprived of courage and strength; "the steeplejack, exhausted and unnerved, couldn't hold on to his dangerous perch much longer"
Antonyms: unafraid, fearless (indirect, via afraid)
- faze, unnerve, enervate, unsettle - disturb the composure of
--1 is one way to upset, discompose, untune, disconcert, discomfit
Sample sentence:
The bad news will unnerve him