Webster's Revised Unabridged Dictionary · 1913

Lethargic

Lethargic (le*thar"jik) , adjective

[Latin lethargicus, Greek lhqargiko`s: compare French léthargique. See Lethargy.]

Pertaining to, affected with, or resembling, lethargy; morbidly drowsy; dull; heavy.

Also: Lethargical