D defs.my
Entry 1 sense Webster, 1913

Lassitude

/(lăs"sĭ*tūd)/ · Las·si·tude · IPA /ˈlæsɪˌtud/
01 n. A condition of the body, or mind, when its voluntary functions are performed with difficulty, and only by a strong exertion of the will; la…
  1. 1.
    A condition of the body, or mind, when its voluntary functions are performed with difficulty, and only by a strong exertion of the will; languor; debility; weariness.
    “The corporeal instruments of action being strained to a high pitch . . . will soon feel a lassitude.” Barrow.