enervating

/ˈɛnərˌveɪtɪŋ/
adjective
  1. Causing a loss of energy or vitality; physically or mentally draining.
    • She found the constant noise of the city enervating and longed for quiet.
    • The enervating heat of the desert made the travelers stop frequently.
    • Studying for twelve hours straight was an enervating experience.
What does "enervating" mean? | whatsthatwordmean | whatsthatwordmean