unnerve

Meanings

1. 1
   verb

   To deprive of nerve, force, or strength; to weaken; to enfeeble. Compare enervate.

   to unnerve the arm

2. 2
   verb

   To make somebody nervous, upset, alarm, shake the resolve of.

   I was greatly unnerved by the news that my attacker was back in the country.

3. 3
   verb

   disturb the composure of

Etymology

From un- + nerve.