Etymologically

fortitudo

Etymology and origin of the Latin word fortitudo

Confidence
Established
Formation
Derivation
First attested
190–159 BC, Terence
Ultimate origin
Latin (fortis)
Etymology tree
inherited borrowed derived
Latin fortis
French fort
Latin fortitudo
Latin fortiter

Pronunciation

  • Classical: [fɔr.tɪˈtuː.doː][1]
  • Ecclesiastical: [for.tiˈtuː.do][1]

Forms

fortitūdō f (genitive fortitūdinis); third declension[1]

Etymology

It is formed from Latin fortis (“strong, brave”) + -tūdō.[2][1][3][4] De Vaan finds the origin of ⟨fortis⟩, older ⟨forctus⟩, undecided: it may be Proto-Italic *forkti/o- from Proto-Indo-European *bʰorǵʰ-to- (“stuffed”), like farciō (“to stuff”), or from a root “firm” seen in Indo-Iranian.[5]

Earliest recorded meaning

Köbler gives Terence as its first author.[6] In the Phormio a slave fears that such boldness will end in the stocks.[2]

Semantic evolution

It is bodily strength, which Phaedrus' she-goats may boast of so long as they do not match the he-goats', and which Lewis and Short find very rare;[2][7] Jerome uses it of the firmness of woven linen.[2][7] Above all it is courage and fortitude, and in the plural deeds of courage.[2]

Church Latin glosses it “strength, power, might, fortitude”.[8] In Medieval Latin it is physical force, compulsion, an army (after Daniel), and of things firmness.[9] English fortitude (late 14th century), first moral strength as a cardinal virtue, comes from it.[4]

Timeline

  • 190–159 BC – Terence of boldness.[2][6]
  • c. 15 BC–c. 50 AD – Phaedrus of physical strength.[2][6]
  • c. 383–419/420 AD – Jerome of the strength of cloth.[7][6]
  • late 14th century – English fortitude.[4]

Meanings

Noun

  1. Physical strength, vigour; firmness.[2][1][7]
  2. Courage, bravery, fortitude;[2][1][8] (plural) brave deeds.[2][1][8]
  3. (Medieval Latin) Force, compulsion; an army.[9]

References

  1. ^ a b c d e f g Wiktionary, the free dictionary, https://en.wiktionary.org
  2. ^ a b c d e f g h i j Glare, P. G. W., ed. (2012), Oxford Latin Dictionary, 2nd ed., Oxford: Oxford University Press
  3. ^ Thesaurus linguae Latinae (1900–), Leipzig: Teubner; Berlin: De Gruyter; open-access ed., Munich: Bayerische Akademie der Wissenschaften
  4. ^ a b c Harper, Douglas. Online Etymology Dictionary, https://www.etymonline.com
  5. ^ de Vaan, Michiel (2008), Etymological Dictionary of Latin and the other Italic Languages, Leiden Indo-European Etymological Dictionary Series 7, Leiden; Boston: Brill
  6. ^ a b c d Köbler, Gerhard (2010), Lateinisches Abkunfts- und Wirkungswörterbuch für Altertum und Mittelalter, online ed., koeblergerhard.de
  7. ^ a b c d Lewis, Charlton T.; Short, Charles (1879), A Latin Dictionary, Oxford: Clarendon Press
  8. ^ a b c Stelten, Leo F. (1995), Dictionary of Ecclesiastical Latin, Peabody, Mass.: Hendrickson
  9. ^ a b Niermeyer, J. F. (1976), Mediae Latinitatis Lexicon Minus, Leiden: Brill
Cite this entry

“Fortitudo.” Etymologically, 18 Oct. 2026, etymologically.com/la/fortitudo. Accessed 19 Oct. 2026.

Last edited on . ·