Etymologically

Etymology and origin of the Latin word facinus

Confidence
Established
Formation
Derivation
First attested
c. 250–184 BC, Plautus
Ultimate origin
Proto-Indo-European (*dʰeh₁-)

Pronunciation

  • Classical: [ˈfa.kɪ.nʊs][1]
  • Ecclesiastical: [ˈfaː.t͡ʃi.nus][1]

Forms

facinus n (genitive facinoris); third declension[1] The genitive is also facineris.[2]

Etymology

It is formed from faciō “to make, do”, with the ending of pignus.[2][3][4][1] De Vaan derives ⟨faciō⟩ from Proto-Italic *fak-i-, from Proto-Indo-European *dʰh₁-k- (“to make”), an extension of *dʰeh₁- (“to put”).[5] Isidore says it is so called “from doing evil”.[4]

Earliest recorded meaning

De Vaan dates it from Plautus,[5] who has hoc est servī facinus frūgī, “this is the deed of an honest slave”.[2]

Semantic evolution

Facinus is first any deed or act, also an event, a “thing”;[2][3] Plautus speaks of the brothers Atridae who did facinus maximum, “a very great deed”.[2][3] Its commonest classical sense is “a misdeed, crime, outrage” (in facinore manifēstō dēprehēnsus, “caught in the act”).[2][3][1] Wiktionary also gives “venture, undertaking”.[1]

Church Latin glosses it “crime”, and in Medieval Latin it is “sin”.[6][7] Döderlein ranks dēlictum and peccātum as lighter offences.[8]

Timeline

  • c. 250–184 BC – Plautus: hoc est servī facinus frūgī.[2][9]
  • 190–159 BC – Terence: sua quae narrat facinora, “the deeds he tells of”.[2][9]
  • 81–43 BC – Cicero: in facinore manifēstō dēprehēnsus.[2][9]

Meanings

Noun

  1. A deed, act, action; an event.[2][3][1]
  2. A venture, undertaking.[1]
  3. A misdeed, crime, outrage.[2][3][1][6]
  4. (Medieval Latin) A sin.[7]

Word family

  • facinorōsus
  • facinerōsus

References

  1. ^ a b c d e f g h i Wiktionary, the free dictionary, https://en.wiktionary.org
  2. ^ a b c d e f g h i j k Glare, P. G. W., ed. (2012), Oxford Latin Dictionary, 2nd ed., Oxford: Oxford University Press
  3. ^ a b c d e f Lewis, Charlton T.; Short, Charles (1879), A Latin Dictionary, Oxford: Clarendon Press
  4. ^ a b Thesaurus linguae Latinae (1900–), Leipzig: Teubner; Berlin: De Gruyter; open-access ed., Munich: Bayerische Akademie der Wissenschaften
  5. ^ a b 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 Stelten, Leo F. (1995), Dictionary of Ecclesiastical Latin, Peabody, Mass.: Hendrickson
  7. ^ a b Niermeyer, J. F. (1976), Mediae Latinitatis Lexicon Minus, Leiden: Brill
  8. ^ Döderlein, Ludwig (1874), Döderlein’s Hand-book of Latin Synonymes, tr. H. H. Arnold, Andover: W. F. Draper
  9. ^ a b c Köbler, Gerhard (2010), Lateinisches Abkunfts- und Wirkungswörterbuch für Altertum und Mittelalter, online ed., koeblergerhard.de
Cite this entry

“Facinus.” Etymologically, 18 Oct. 2026, etymologically.com/la/facinus. Accessed 18 Oct. 2026.

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