Etymologically

Etymology and origin of the Latin word fortuito

Confidence
Established
Formation
Derivation
First attested
81–43 BC, Cicero
Ultimate origin
Proto-Italic (*fortu-)
Etymology tree
inherited borrowed derived
Latin fortuitus
Latin fortuito

Pronunciation

  • Classical: [fɔr.tuˈiː.toː][1]
  • Ecclesiastical: [for.tuˈiː.to][1]

Forms

fortuītō (not comparable)[1]

Etymology

It is from Latin fortuītus (“happening by chance”) + -ō, an adverb from the adjective.[2][3] De Vaan explains fortuītus from a u-stem Proto-Italic *fortu- (“luck”) beside the noun fors (“chance”), and says the origin of the ending ⟨-ītus⟩, as in grātuītus, is unclear.[4]

Earliest recorded meaning

Köbler finds it first in Cicero,[3] who in his Timaeus says an animal moves, but without measure and at random.[2]

Semantic evolution

It means by mere chance, without design, and also haphazardly: Vitruvius has walls that settle unevenly, Columella a task not to be done at random, and Tacitus marked twigs scattered at random.[2] Döderlein distinguishes it from cāsū “by accident” and forte “as it happened”: fortuītō stresses mere chance, as against a cause.[5] A variant fortuītū is also found.[6][7]

Timeline

  • 81–43 BC – Cicero, of random movement.[2][3]
  • c. 84–c. 25 BC – Vitruvius, of walls settling haphazardly.[2][3]
  • 98–115 AD – Tacitus, of twigs scattered at random.[2][3]

Meanings

Adverb

  1. By mere chance, accidentally, without design.[2][1][7][5]
  2. Without fixed order, haphazardly, at random.[2]

References

  1. ^ a b c d Wiktionary, the free dictionary, https://en.wiktionary.org
  2. ^ a b c d e f g h 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. ^ de Vaan, Michiel (2008), Etymological Dictionary of Latin and the other Italic Languages, Leiden Indo-European Etymological Dictionary Series 7, Leiden; Boston: Brill
  5. ^ a b Döderlein, Ludwig (1874), Döderlein’s Hand-book of Latin Synonymes, tr. H. H. Arnold, Andover: W. F. Draper
  6. ^ Lewis, Charlton T.; Short, Charles (1879), A Latin Dictionary, Oxford: Clarendon Press
  7. ^ a b Stelten, Leo F. (1995), Dictionary of Ecclesiastical Latin, Peabody, Mass.: Hendrickson
Cite this entry

“Fortuito.” Etymologically, 20 Oct. 2026, etymologically.com/la/fortuito. Accessed 20 Oct. 2026.

Last edited on . ·