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).
From Dutch lethargie, from Latin lēthargia, from Ancient Greek ληθαργία (lēthargía, “drowsiness”), from λήθαργος (lḗthargos, “forgetful, lethargic”), from λήθη (lḗthē, “forgetfulness”) + ἀργός (argós, “not working, idle”).