Etymologically

lethargicus

Etymology and origin of the Latin word lethargicus

Confidence
Established
Formation
Borrowing
First attested
65–8 BC Horace, Satires More words from the 1st century BC
Borrowed from
Ancient Greek ληθαργικός
Ultimate origin
Ancient Greek λήθαργος

Pronunciation

  • Classical: [ɫeːˈtʰaːr.ɡɪ.kʊs][1]
  • Ecclesiastical: [leˈtar.d͡ʒi.kus][1]

Forms

lēthārgicus (feminine lēthārgica, neuter lēthārgicum); first/second-declension adjective[1]

Etymology

It is borrowed from Ancient Greek ληθαργικός (lēthargikós, “drowsy”),[2][1][3] from λήθαργος (lḗthargos, “forgetful; inactive”).[3][4] Köbler compares λήθη (lḗthē, “forgetfulness”) and ἀργός (argós, “idle”).[4]

Earliest recorded meaning

Horace is the first to use it, as a noun for a person suffering from lethargy: “ut lethargicus hic cum fit pugil et medicum urget” (“as when this sleepy man turns boxer and goes for his doctor”).[5][6][7]

Semantic evolution

The noun is frequent in Pliny the Elder, usually in the plural,[6][7] who also has the adjective in morbus lethargicus.[5] Caelius Aurelianus speaks of the lethargic illness,[6] Augustine of lethargic sleep,[5][6] and Marcellus notes that the Greeks call the drowsy lethargici.[8]

Medieval Latin, often spelling it litargicus or letargicus, used it of the sick[9] and figuratively of the sluggish and negligent.[10] English borrowed it in the late 14th century as litargik.[3]

Timeline

  • 65–8 BC – Horace uses it of a lethargic man.[5][4]
  • 23/24–79 AD – Pliny the Elder uses the noun and the adjective.[5][6][4]
  • 354–430 AD – Augustine speaks of lethargic sleep.[5][6][4]
  • 5th century AD – Caelius Aurelianus speaks of the lethargic illness.[6][4]
  • late 14th century – English borrows it as litargik.[3]

Meanings

Adjective

  1. Drowsy, lethargic: morbus lēthargicus.[5][6]
  2. (Medieval Latin, figurative) Sluggish, negligent.[10]

Noun

  1. A person suffering from lethargy.[2][5]

Usage notes

Medieval texts often spell it litargicus or letargicus.[9]

References

  1. ^ a b c d Wiktionary, the free dictionary, https://en.wiktionary.org
  2. ^ a b Glare, P. G. W., ed. (2012), Oxford Latin Dictionary, 2nd ed., Oxford: Oxford University Press
  3. ^ a b c d Harper, Douglas. Online Etymology Dictionary, https://www.etymonline.com
  4. ^ a b c d e f Köbler, Gerhard (2010), Lateinisches Abkunfts- und Wirkungswörterbuch für Altertum und Mittelalter, online ed., koeblergerhard.de
  5. ^ a b c d e f g h Lewis, Charlton T.; Short, Charles (1879), A Latin Dictionary, Oxford: Clarendon Press
  6. ^ a b c d e f g h Georges, Karl Ernst (1913–1918), Ausführliches lateinisch-deutsches Handwörterbuch, 8th ed., ed. Heinrich Georges, Hannover; Leipzig: Hahn
  7. ^ a b Conte, Gian Biagio; Pianezzola, Emilio; Ranucci, Giuliano (2010), il Latino: Vocabolario della lingua latina, 3rd ed., Florence: Le Monnier
  8. ^ Thesaurus linguae Latinae (1900–), Leipzig: Teubner; Berlin: De Gruyter; open-access ed., Munich: Bayerische Akademie der Wissenschaften
  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
  10. ^ a b Novum Glossarium Mediae Latinitatis ab anno DCCC usque ad annum MCC (1957–), Copenhagen / Geneva / Paris: Union Académique Internationale; IRHT

Related etymologies

Cite this entry

“Lethargicus.” Etymologically, 7 Nov. 2026, etymologically.com/la/lethargicus. Accessed 8 Nov. 2026.

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