Unnerve

глагол 1) ослаблять, лишать силы [в прямом и переносном значении] 2) лишать присутствия духа, лишать мужества

Большой англо-русский словарь

Unnerve

transitive verb 1. to deprive of courage, strength, or steadiness 2. to cause to become nervous; upsetunnervingly adverb Synonyms: unnerve, enervate, unman, emasculate mean to deprive of strength or vigor and the capacity for effective action. unnerve implies marked often temporary loss of courage, self-control, or power to act Example: unnerved by the near collision. enervate suggests a gradual physical or moral weakening (as through luxury or indolence) until one is too feeble to make an effort Example: a nation's youth enervated by affluence and leisure. unman implies a loss of manly vigor, fortitude, or spirit Example: a soldier unmanned by the terrors of battle. emasculate stresses a depriving of characteristic force by removing something essential Example: an amendment that emasculates existing safeguards.

Merriam-Webster's Collegiate Dictionary