Etymologically
Log in

firmitudo

History Permalink

Etymology and origin of the Latin word firmitudo

Confidence
Established
Formation
Derivation
First attested
c. 250–184 BC, Plautus
Ultimate origin
Proto-Indo-European (*dʰer-mo-)
Etymology tree
inherited borrowed derived
Latin firmus
French ferme
Latin infirmus
Latin infirmitas
Latin infirmo
Latin firmitudo
Latin firmitas
Latin firmo
English firm
French fermer
French enfermer
French refermer
Latin firmamentum

Pronunciation

  • Classical: [fɪr.mɪˈtuː.doː][1]
  • Ecclesiastical: [fir.miˈtuː.do][1]

Forms

firmitūdō f (genitive firmitūdinis); third declension[1]

Etymology

It is from Latin firmus (“firm”) + -tūdō.[2][1] De Vaan traces firmus to Proto-Italic *fermo- and Proto-Indo-European *dʰer-mo- (“holding”).[3] Cognate with Sanskrit धर्मन् (dhárman-, “support, firm hold, law”).[3]

Earliest recorded meaning

De Vaan dates it from Plautus,[3] in whom someone says “if you keep that firmness of mind, we are saved”, si istam firmitudinem animi optines, salvi sumus.[2]

Semantic evolution

Of things it is strength or durability: Caesar writes that the Roman ships could not harm the enemy's with their beaks, so great was their strength, and writes of the firmness of the bridge.[2][4] The Rhetorica ad Herennium uses it of the steadiness of the voice, and Cicero of the stability of a constitution.[2] Tacitus uses it of a person's soundness of health.[2] Of a person or mind it is firmness of purpose, steadfastness,[2] and of a promise reliability, as when Cicero doubts that a safe-conduct from that man will have any reliability.[2] Lewis & Short note it is less frequent than firmitās but classical.[4]

Timeline

  • c. 250–184 BC – Plautus, of firmness of mind.[2][3][5]
  • 81–43 BC – Cicero, of the stability of a constitution.[2][5]
  • c. 50 BC – Caesar, of the strength of ships and a bridge.[2][5]
  • 98–115 AD – Tacitus, of soundness of health.[2][5]

Meanings

Noun

  1. Strength, durability, firmness;[2][4][1] soundness of health;[2] steadiness of the voice.[2]
  2. Stability, permanence.[2][1]
  3. Firmness of purpose, steadfastness, constancy.[2][4][1]
  4. Reliability;[2][1] of arguments, force.[2]

References

  1. ^ a b c d e f g h Wiktionary, the free dictionary, https://en.wiktionary.org
  2. ^ a b c d e f g h i j k l m n o p q r Glare, P. G. W., ed. (2012), Oxford Latin Dictionary, 2nd ed., Oxford: Oxford University Press
  3. ^ a b c d de Vaan, Michiel (2008), Etymological Dictionary of Latin and the other Italic Languages, Leiden Indo-European Etymological Dictionary Series 7, Leiden; Boston: Brill
  4. ^ a b c d Lewis, Charlton T.; Short, Charles (1879), A Latin Dictionary, Oxford: Clarendon Press
  5. ^ a b c d Köbler, Gerhard (2010), Lateinisches Abkunfts- und Wirkungswörterbuch für Altertum und Mittelalter, online ed., koeblergerhard.de
Cite this entry

“Firmitudo.” Etymologically, 20 Oct. 2026, etymologically.com/la/firmitudo. Accessed 20 Oct. 2026.

Last edited on . ·