Lethargy (pathological drowsiness) · Lethargy (apathy, lack of emotions and interest) · Lethargy (quantity characterizing the rate of decelaration of neutrons)
köken: From late Latin lēthargia, from Ancient Greek ληθαργία (lēthargía, “drowsiness”), from λήθαργος (lḗthargos, “forgetful, lethargic”). This is a compound of λήθη (lḗthē, “oblivion”) and ἀργός (argós, “idle”), which consists of negative prefix ἀ- (a-) and noun ἔργον (érgon, “deed, work”).
köken: From Latin lēthārgia, from Ancient Greek ληθᾱργῐ́ᾱ (lēthārgĭ́ā, “sleepiness, drowsiness”). Compare French léthargie, Italian letargia, German Lethargie, Spanish letargo, Polish letarg, Russian летарги́я (letargíja).