Etymologically

iudaismus

Etymology and origin of the Latin word iudaismus

Confidence
Established
Formation
Borrowing
First attested
c. 160–220 Tertullian More words from the 2nd century
Borrowed from
Ancient Greek Ἰουδαϊσμός
Ultimate origin
Ancient Greek Ἰουδαϊσμός
Etymology tree
inherited borrowed derived
Ancient Greek Ἰουδαῖος (Ioudaîos)
Latin iūdaeus
German jüdisch
Ancient Greek Ἰουδαϊσμός (Ioudaïsmós)
Latin iudaismus
From the same root
English Jew ← Ἰουδαῖος
English Judaism ← Ἰουδαϊσμός

Forms

iūdaismus m (genitive iūdaismī); second declension[1] Also written Iūdaismus and Iūdaeismus;[1] manuscripts have -days- and -d(a)eis- as well.[2]

Etymology

It is borrowed from Ancient Greek Ἰουδαϊσμός (Ioudaïsmós),[3][4][5] the Greek word it renders wherever it occurs,[2] formed from Ἰουδαῖος (Ioudaîos, “Jew”).[5]

Earliest recorded meaning

It is found from Tertullian and the Old Latin Bible on.[2] Tertullian uses it in Against Marcion for the Jewish religion, Judaism.[6][7][4]

Semantic evolution

In Late Latin it named Jewish religious practice and way of life, including circumcision,[2] and Jerome sets it beside paganism.[2] Medieval writers used it for the Jewish faith, often of people who converted to it or from it,[8][3] and for Jewish customs and learning.[8]

In medieval towns it came to mean the Jewish quarter and the Jewish community, a Jewry;[9][3] in England it also meant indebtedness to a Jewish lender.[3] Etymonline notes that the word appears in Anglo-Latin from the mid-13th century, before English Judaism (c. 1400).[5]

Timeline

  • c. 160–220 AD – Tertullian uses it for the Jewish religion.[6][10]
  • 745 – A letter in the correspondence of Boniface accuses Clement of bringing Judaism upon Christians.[3]
  • under 838 – The Annales Alamannici report that the deacon Puoto fell into Judaism.[8]
  • c. 1183 – A London charter mentions a church in the Jewry.[3]
  • 1236 – It is used in England for debt owed to a Jewish lender.[3]
  • c. 1400 – English has Judaism, partly directly from Late Latin.[5]

Meanings

Noun

  1. Judaism, the Jewish religion and way of life.[6][2][7]
  2. (Medieval Latin) Jewish customs and learning.[8]
  3. (Medieval Latin) The Jewish quarter of a town, a Jewry; the Jewish community.[9][3]
  4. (Medieval Latin) Indebtedness to a Jewish lender.[3]

References

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

Related etymologies

Cite this entry

“Iudaismus.” Etymologically, 7 Nov. 2026, etymologically.com/la/iudaismus. Accessed 8 Nov. 2026.

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