Etymologically

authenticus

Etymology and origin of the Latin word authenticus

Confidence
Established
Formation
Borrowing
First attested
c. 160–220 AD, Tertullian
Borrowed from
Ancient Greek αὐθεντικός
Ultimate origin
Ancient Greek αὐθεντικός
Etymology tree
inherited borrowed derived
Latin authenticus
French authentique

Pronunciation

  • Classical: [au̯ˈtʰɛn.tɪ.kʊs][1]
  • Ecclesiastical: [au̯ˈtɛn.ti.kus][1]

Forms

authenticus (feminine authentica, neuter authenticum); first/second-declension adjective[1]

Etymology

It is borrowed from Ancient Greek αὐθεντικός (authentikós, “principal, genuine”).[2][3][1][4] Etymonline derives the Greek adjective from αὐθέντης (authéntēs, “one acting on his own authority”), a compound of αὐτός (autós, “self”) and a noun meaning “doer”.[5]

It passed into Old French as autentique;[5] English authentic comes both from the French word and directly from the Medieval Latin one.[5] Conte gives it as the source of Italian autentico.[6]

Earliest recorded meaning

It is a word of the jurists and the Church Fathers.[3] Tertullian speaks of the apostles' authenticae litterae, their letters in the original,[7] and the jurists of the Digest use it of an original document as against a copy: Ulpian has tabulās vērō authenticās of an original will, which the heir keeps while handing over a copy.[7][2]

Semantic evolution

The neuter authenticum became a noun for the original text: Paulus rules that a person sued by the treasury must be sued on the original and not on a copy, and Tertullian and Jerome appeal to the Greek or Hebrew original of the Bible.[7][3] Georges and Köbler also record it in the sense “reliable, vouched for”, in the veterinary writer Pelagonius.[8][9] Sidonius Apollinaris uses the masculine plural as a noun for the apostles.[10]

In medieval Latin a document is authenticus when it comes from the author of the deed, and so valid in law, especially canon law; a person so called is trustworthy.[11] British sources apply it to seals, to authoritative texts and pronouncements, to persons and institutions having authority, and to the high altar (altāre authenticum).[12] The authentica hebdomada was the week before Whitsun, and authenticum could also name an antiphonary.[11] Köbler notes a medieval musical sense, “in the principal mode”.[9]

English borrowed it in the mid-14th century as autentik “authoritative”, a sense now obsolete.[5]

Timeline

  • c. 160–220 AD – Tertullian calls the apostles' original letters authenticae litterae.[7][9]
  • before 223 AD – Ulpian uses it of an original will.[2][7][9]
  • c. 383–420 AD – Jerome refers to the original Hebrew and Greek texts of the Bible as authentica.[7][9]
  • c. 431–486 AD – Sidonius Apollinaris uses the plural as a noun for the apostles.[10][9]
  • 1181 – A papal charter for Beverley refers to what is contained in authentic writings.[12]
  • mid-14th century – English borrows it as autentik.[5]

Meanings

Adjective

  1. (of documents) original, in the author's own hand, as opposed to a copy.[2][3][8]
  2. (Late Latin) reliable, vouched for.[8][9]
  3. (Medieval Latin) Valid in law, especially in canon law.[11][12]
  4. (Medieval Latin, of persons) trustworthy; having authority.[11][12]
  5. (Medieval Latin, of seals, texts and usages) authoritative, approved by authority.[12][4]

Noun

  1. (neuter) The original of a document or text.[3][7][8]
  2. (Late Latin, masculine plural) The apostles.[10]
  3. (Medieval Latin, neuter) A legally valid document; an antiphonary.[11]

Word family

  • authenticum
  • authenticē

References

  1. ^ a b c d Wiktionary, the free dictionary, https://en.wiktionary.org
  2. ^ a b c d Glare, P. G. W., ed. (2012), Oxford Latin Dictionary, 2nd ed., Oxford: Oxford University Press
  3. ^ a b c d e Lewis, Charlton T.; Short, Charles (1879), A Latin Dictionary, Oxford: Clarendon Press
  4. ^ a b Mittellateinisches Wörterbuch bis zum ausgehenden 13. Jahrhundert (1967–), Munich: C. H. Beck; Bayerische Akademie der Wissenschaften
  5. ^ a b c d e Harper, Douglas. Online Etymology Dictionary, https://www.etymonline.com
  6. ^ Conte, Gian Biagio; Pianezzola, Emilio; Ranucci, Giuliano (2010), il Latino: Vocabolario della lingua latina, 3rd ed., Florence: Le Monnier
  7. ^ a b c d e f g Thesaurus linguae Latinae (1900–), Leipzig: Teubner; Berlin: De Gruyter; open-access ed., Munich: Bayerische Akademie der Wissenschaften
  8. ^ a b c d Georges, Karl Ernst (1913–1918), Ausführliches lateinisch-deutsches Handwörterbuch, 8th ed., ed. Heinrich Georges, Hannover; Leipzig: Hahn
  9. ^ a b c d e f g Köbler, Gerhard (2010), Lateinisches Abkunfts- und Wirkungswörterbuch für Altertum und Mittelalter, online ed., koeblergerhard.de
  10. ^ a b c Gaffiot, Félix (2016), Dictionnaire latin-français, new ed. by Gérard Gréco et al. (Gaffiot 2016), online ed.
  11. ^ a b c d e Niermeyer, J. F. (1976), Mediae Latinitatis Lexicon Minus, Leiden: Brill
  12. ^ a b c d e 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

Borrowed into

Related etymologies

Cite this entry

“Authenticus.” Etymologically, 23 Oct. 2026, etymologically.com/la/authenticus. Accessed 23 Oct. 2026.

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