unnerve Meaning, Definition & Usage

  1. verb disturb the composure of
    faze; unsettle; enervate.

WordNet

Un*nerve" transitive verb
Etymology
1st pref. un- + nerve.
Definitions
  1. To deprive of nerve, force, or strength; to weaken; to enfeeble; as, to unnerve the arm.
    Unequal match'd, . . . The unnerved father falls. Shak.

Webster 1913