Etymologically

facinorosus

Etymology and origin of the Latin word facinorosus

Confidence
Established
Formation
Derivation
First attested
81–43 BC, Cicero
Ultimate origin
Latin faciō
Etymology tree
inherited borrowed derived
Latin facinus
Latin facinorosus

Pronunciation

  • Classical: [fa.kɪ.nɔˈroː.sʊs][1]
  • Ecclesiastical: [fa.t͡ʃi.noˈrɔː.s̬us][1]

Forms

facinorōsus (feminine facinorōsa, neuter facinorōsum, comparative facinorōsior, superlative facinorōsissimus); first/second-declension adjective[1] A spelling facinerōsus is also found, and the grammarian Velius Longus preferred it.[2][3]

Etymology

It is from Latin facinus (“deed, crime”) + -ōsus (“full of”).[2][1] The noun is formed from faciō (“to do, make”),[2] which de Vaan traces to Proto-Italic *fak-i- and ultimately to Proto-Indo-European *dheh1- (“to put”).[4]

Earliest recorded meaning

It is first found in Cicero,[5] who in the Catilinarians names a class made up of parricides, assassins and “omnium facinorosorum”, all criminals.[6]

Semantic evolution

Classical writers used it of people and of their lives and minds as criminal or wicked,[2][6] and as a plural noun, facinorōsī, for criminals.[7] L&S call it rare but classical; the superlative appears in Cicero and the comparative in Justin.[6] Augustine formed the adverb facinorōsē.[6]

Medieval writers kept the word for wicked people and acts, and British sources use it of criminals held in prison.[8] English borrowed it in the 16th century as facinorous.[9]

Timeline

  • 81–43 BC – Cicero uses it of criminals in the Catilinarians and of a wicked life in the De legibus.[6][5]
  • 390–406 AD – The Vulgate has the superlative in 2 Maccabees.[6][5]
  • Middle Ages – Bede and later British writers use it of wicked people and acts.[8]
  • 1540s – English borrows it as facinorous.[9]

Meanings

Adjective

  1. Criminal, wicked, villainous.[2][6][7]

Noun

  1. (plural) Criminals, wicked people.[7][8]
  • English facinorous

References

  1. ^ a b c d Wiktionary, the free dictionary, https://en.wiktionary.org
  2. ^ a b c d e 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. ^ 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 c Köbler, Gerhard (2010), Lateinisches Abkunfts- und Wirkungswörterbuch für Altertum und Mittelalter, online ed., koeblergerhard.de
  6. ^ a b c d e f g Lewis, Charlton T.; Short, Charles (1879), A Latin Dictionary, Oxford: Clarendon Press
  7. ^ a b c Georges, Karl Ernst (1913–1918), Ausführliches lateinisch-deutsches Handwörterbuch, 8th ed., ed. Heinrich Georges, Hannover; Leipzig: Hahn
  8. ^ a b c 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
  9. ^ a b Harper, Douglas. Online Etymology Dictionary, https://www.etymonline.com
Cite this entry

“Facinorosus.” Etymologically, 20 Oct. 2026, etymologically.com/la/facinorosus. Accessed 23 Oct. 2026.

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