λήθαργος

Etymology
Traditionally derived from. Beekes prefers to compare the word to and take both as, though he does note that the traditional etymology seems to have influenced its meaning via folk etymology.

Adjective

 * 1) forgetful
 * 2) lethargic
 * 1) lethargic

Noun

 * 1) lethargy
 * 2)  lethargic fever