lethargy

noun, plural leth·ar·gies.

1. the quality or state of being drowsy and dull, listless and unenergetic, or indifferent and lazy; apathetic or sluggish inactivity.
2. Pathology. an abnormal state or disorder characterized by overpowering drowsiness or sleep.

noun plural -gies

1. sluggishness, slowness, or dullness
2. an abnormal lack of energy, esp as the result of a disease

n.late 14c., litarge, from Old French litargie or directly from Medieval Latin litargia, from Late Latin lethargia, from Greek lethargia “forgetfulness,” from lethargos “forgetful,” originally “inactive through forgetfulness,” from lethe “forgetfulness” (see latent) + argos “idle” (see argon). The form with -th- is from 1590s in English. n.

1. A state of sluggishness, inactivity, and apathy.
2. A state of unconsciousness resembling deep sleep.