unnerves is a form of:

Unnerve



verb
1.
(TRANSITIVE) (To deprive of courage, strength; cause to feel weak) ធ្វើអោយអស់សេចក្ដីក្លាហាន, ធ្វើអោយខ្លាច, បន្លាច
Example: The sight of the disaster unnerved.
2.
(បច្ចេកទេស) ធ្វើអោយអស់សេចក្តីក្លាហាន
ENGLISH MEANING
verb
1.
(TRANSITIVE) To deprive of nerve, force, or strength; to weaken; to enfeeble; as, to unnerve the arm.