Morbid drowsiness; continued or profound sleep, from which a person can scarcely be awaked.

A state of inaction or indifference.

Drowsiness or decreased responsiveness.

Lethargy was a mathcore band formed in Rochester, New York during the early 1990s, breaking up in 1999. Drummer Brann Dailor and guitarist Bill Kelliher would later appear in Today is the Day and Mastodon, while guitarist and vocalist Erik Burke would later appear in Nuclear Assault and Sulaco.

Sleepiness.

a state of comatose torpor (as found in sleeping sickness)

Having a low activity level; not responding to surroundings or stimuli. Lethargy is most often a sign of serious illness and should not be ignored or mistaken for "tameness".

weakness characterized by a lack of vitality or energy

To lethargize.