Etymologically

lethargia

Etymology and origin of the Latin word lethargia

Confidence
Established
Formation
Borrowing
First attested
Caelius Aurelianus
Borrowed from
Ancient Greek ληθαργία
Ultimate origin
Ancient Greek (ληθαργία)
Etymology tree
inherited borrowed derived
Latin lethargia
English lethargy

Pronunciation

  • IPA (Ecclesiastical): [leˈtar.d͡ʒi.a], [leˈtar.d͡ʒi.a][1]

Forms

lēthārgia f (genitive lēthārgiae); first declension[1]

Etymology

It is borrowed from Ancient Greek ληθαργία (lēthargía, “drowsiness, forgetfulness”), from λήθαργος (lḗthargos, “forgetful”).[2][1][3] Etymonline traces it further to λήθη (lḗthē, “forgetting”).[4] Pliny Valerianus says it is named from forgetfulness of mind and wandering of the body.[5]

Earliest recorded meaning

Caelius Aurelianus uses it in his work on acute diseases.[6][7] Köbler dates him to the 5th century AD and names Pliny the Elder as a source, but Georges notes that the text of Pliny now reads lethargo.[3][7]

Semantic evolution

It was a medical term for lethargy or drowsiness, the same as lethargus.[2][8] Caelius Aurelianus defines it as a delirium with acute and dangerous fevers.[5]

Alcuin uses it of a sluggard pinned to his bed by lethargy rather than sleep, and a glossary lists it with apoplexy and spasm.[9] Medieval Latin also spelled it litargia, the source of English lethargy, recorded in the late 14th century.[4][3]

Timeline

  • 5th century AD – Caelius Aurelianus uses it.[6][3]
  • 2nd half of the 8th century – Alcuin uses it of a sluggard.[9][3]
  • late 14th century – English lethargy is recorded as litarge.[4]

Meanings

Noun

  1. (medicine) lethargy, drowsiness.[2][1]

References

  1. ^ a b c d Wiktionary, the free dictionary, https://en.wiktionary.org
  2. ^ a b c Glare, P. G. W., ed. (2012), Oxford Latin Dictionary, 2nd ed., Oxford: Oxford University Press
  3. ^ a b c d e Köbler, Gerhard (2010), Lateinisches Abkunfts- und Wirkungswörterbuch für Altertum und Mittelalter, online ed., koeblergerhard.de
  4. ^ a b c Harper, Douglas. Online Etymology Dictionary, https://www.etymonline.com
  5. ^ a b Thesaurus linguae Latinae (1900–), Leipzig: Teubner; Berlin: De Gruyter; open-access ed., Munich: Bayerische Akademie der Wissenschaften
  6. ^ a b Lewis, Charlton T.; Short, Charles (1879), A Latin Dictionary, Oxford: Clarendon Press
  7. ^ a b Georges, Karl Ernst (1913–1918), Ausführliches lateinisch-deutsches Handwörterbuch, 8th ed., ed. Heinrich Georges, Hannover; Leipzig: Hahn
  8. ^ Gaffiot, Félix (2016), Dictionnaire latin-français, new ed. by Gérard Gréco et al. (Gaffiot 2016), online ed.
  9. ^ a b Latham, R. E., D. R. Howlett, R. K. Ashdowne, et al. (1975–2013), Dictionary of Medieval Latin from British Sources, London: British Academy / Oxford University Press

Descendants

Related etymologies

Cite this entry

“Lethargia.” Etymologically, 15 Oct. 2026, etymologically.com/la/lethargia. Accessed 15 Oct. 2026.

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