Etymologically

Etymology and origin of the Latin word letalis

Confidence
Established
Formation
Derivation
First attested
70–19 BC, Virgil
Ultimate origin
Proto-Indo-European (*leh1-to-)
Etymology tree
inherited borrowed derived
Latin letum
Latin letifer
Latin letalis

Pronunciation

  • Classical: [ɫeːˈtaː.lɪs][1]
  • Ecclesiastical: [leˈtaː.lis][1]

Forms

lētālis (neuter lētāle); third-declension two-termination adjective[1] It is also spelt lēthālis.[2] Etymonline explains this Late Latin spelling by association with Greek lēthē, “forgetfulness”.[3]

Etymology

It is from Latin lētum (“death”) + -ālis,[4][1][5] formed like vītālis and exitiālis.[5] De Vaan derives lētum from Proto-Italic *lēto- and Proto-Indo-European *leh1-to-, perhaps a past participle “let go” used as a noun, “letting go” and so “death”, and compares Slavic words for “summer, year”.[6]

Earliest recorded meaning

According to the TLL it is found from Virgil and Ovid on, and its reading in Lucretius is doubtful;[5] Köbler dates it from Lucretius.[7] Virgil has haeret laterī lētālis harundō, “the deadly arrow clings to her side”.[4][5]

Semantic evolution

It means deadly, fatal or mortal, of wounds, weapons, poisons and diseases,[4][2] and also of things connected with death, as Ovid's deadly cold.[4] Lewis & Short note that it is mostly poetic and late;[2] the TLL finds it in prose only from Seneca and Pliny the Elder on.[5] It has no comparative or superlative.[5] Livy uses the neuter plural lētālia for means of death,[2] and Statius the neuter as an adverb, “in a deadly way”.[2] In Medieval Latin it could mean leading to the loss of the soul, of mourning, mortal or perishable, and cadaverous.[8] English took lethal from the Late Latin spelling lethalis in the 1580s.[3]

Timeline

  • 70–19 BC – Virgil uses it of a deadly arrow.[4][5][7]
  • 59 BC–17 AD – Livy has lētālia, means of death.[2][7]
  • 43 BC–18 AD – Ovid uses it of deadly cold and a sword.[4][2][7]
  • 4 BC–65 AD – Seneca uses it in prose.[5][7]
  • 1580s – English borrows it as lethal.[3]

Meanings

Adjective

  1. Of or connected with death.[4]
  2. Deadly, fatal, lethal, mortal.[4][2][1]
  3. (Medieval Latin) Leading to the perdition of the soul; mortal, perishable.[8]

References

  1. ^ a b c d e Wiktionary, the free dictionary, https://en.wiktionary.org
  2. ^ a b c d e f g h Lewis, Charlton T.; Short, Charles (1879), A Latin Dictionary, Oxford: Clarendon Press
  3. ^ a b c Harper, Douglas. Online Etymology Dictionary, https://www.etymonline.com
  4. ^ a b c d e f g h Glare, P. G. W., ed. (2012), Oxford Latin Dictionary, 2nd ed., Oxford: Oxford University Press
  5. ^ a b c d e f g h Thesaurus linguae Latinae (1900–), Leipzig: Teubner; Berlin: De Gruyter; open-access ed., Munich: Bayerische Akademie der Wissenschaften
  6. ^ de Vaan, Michiel (2008), Etymological Dictionary of Latin and the other Italic Languages, Leiden Indo-European Etymological Dictionary Series 7, Leiden; Boston: Brill
  7. ^ a b c d e Köbler, Gerhard (2010), Lateinisches Abkunfts- und Wirkungswörterbuch für Altertum und Mittelalter, online ed., koeblergerhard.de
  8. ^ a b Niermeyer, J. F. (1976), Mediae Latinitatis Lexicon Minus, Leiden: Brill
Cite this entry

“Letalis.” Etymologically, 20 Oct. 2026, etymologically.com/la/letalis. Accessed 20 Oct. 2026.

Last edited on . ·