Lethargical :: Lethargical (a.) Pertaining to, affected with, or resembling, lethargy; morbidly drowsy; dull; heavy..
Lethargy :: Lethargy (n.) Morbid drowsiness; continued or profound sleep, from which a person can scarcely be awaked..
Lethargy :: Lethargy (n.) A state of inaction or indifference.