The correct answer is weaken.
C. convey impulses
D. make nervous
The correct answer is (A) To weaken; to tire physically, emotionally; To diminish the force, strength, or vitality of; to lessen the mental vigor; to deplete the willpower.
Enervate comes from Latin enervare.
Examples of use:
- The heat and humidity enervated the family pets.
- He was enervated by the hot waters of the spa.