Etymologically

Etymology and origin of the Catalan word deu

deu1 ten

Confidence
Established
Formation
Inherited
First attested
1200s Ramon Llull
Inherited from
Latin decem
Ultimate origin
Proto-Indo-European *déḱm̥
Etymology tree of deu1
inherited borrowed derived
Proto-Indo-European *déḱm̥
Ancient Greek δέκα (déka)
Latin decem
Catalan deu
French dix
Italian dieci
Romanian zece
Spanish diez
The journey of deu1
From the same root · deu1
Ancient Greek δεκάς (dekás) ← δέκα
English decimate ← decem
Latin decānus ← decem
Latin December ← decem
Latin decempeda ← decem
Latin decemvir ← decem
Latin decennis ← decem
Latin deciēns ← decem
Latin decuria ← decem
Latin dēnī ← decem
Latin duodecim ← decem
Latin quattuordecim ← decem
Latin quīndecim ← decem
Latin sēdecim ← decem
Latin septendecim ← decem
Latin trēdecim ← decem
Latin ūndecim ← decem
Romanian treizeci ← zece

Pronunciation

  • Northern: [ˈde̞w][1]
  • Balearic, Central, Northwestern, Valencia: [ˈdɛw][1]

Forms

deu m or f[1]

Etymology

The word for the number ten is inherited from Latin decem (“ten”).[2][3][4][5][1]

The same Latin word is Old Occitan detz, French dix, Spanish diez, Italian dieci and Romanian zece.[6][7]

The Latin numeral goes back to *dekem and *déḱm̥, cognate with δέκα (déka) and the English word ten.[1][8]

Earliest recorded meaning

Coromines and the GDLC place the word in the oldest texts of the language.[2][5] Llull writes of los deu manaments, the Ten Commandments, in the Llibre del gentil.[9]

Semantic evolution

The ordinal was formed with the Romance suffix -è from Latin -ēnus: the old form was deè, feminine deena, from a prehistoric dezen with the regular loss of intervocalic /z/;[9] desè, with the /z/ restored, finally won out, partly because a contracted masculine dè would have been too short and too far from deu.[2] From the feminine come dena, each set of ten beads of a rosary, and desena.[2] Desembre went through the same changes: Desclot writes dehembre, and a document of 1374 dembra.[2]

Bruguera groups with the numeral the compounds dinou, disset and divuit, and degà from Latin decanus.[4]

Timeline

  • 1200s – Llull: los deu manaments.[9]

Meanings

Numeral

  1. ten, nine plus one.[10][5][1]
  2. Tenth, in numbering.[10][5]

Noun

  1. The number ten, 10; a thing marked with it.[10][5][1]
  2. les deu: ten o'clock.[10]

Word family

  • desè
  • desena
  • dena

deu2 spring of water

Confidence
Disputed
Formation
Inherited
First attested
c. 1270 Cerverí de Girona, in the form dotz
Inherited from
Old Catalan dou

Pronunciation

  • Northern: [ˈde̞w][1]
  • Balearic, Central, Northwestern, Valencia: [ˈdɛw][1]

Forms

deu f (plural deus)[1] Old Catalan had dotz (Cerverí de Girona, c. 1270) and dou (Muntaner, c. 1330); deu is found from a document of 1441.[11] In Roussillon place names have dú, and at Talteüll dúk.[11]

Etymology

The word for the spring is inherited from Old Catalan dou, earlier dotz.[11][3][1] The change from /ow/ to /ew/ is the one that made ⟨crou⟩ into creu and ⟨vou⟩ into veu.[11][3]

The further origin is uncertain.[11][12] The same feminine noun is Old Occitan dotz and, with the article fused to it, adotz; dialects of Franche-Comté and Burgundy have ⟨douis⟩, and Piedmontese has ⟨doss⟩.[11] The REW sets up a Latin feminine *dux (“spring”) beside dux (“leader”), and Wiktionary calls the word pre-Roman, influenced by the Latin noun.[13][1] Coromines rejects the derivation from the Latin noun: the form coincides with the Latin noun and comes close to ductus (“conduit”), but the meanings differ and the Latin words are masculine.[11] He takes it as probably pre-Roman and Indo-European in its structure, perhaps a noun ⟨doukis⟩ or ⟨dūkis⟩, “bubbling of water”, from *dheu-, *dheuk- “to move turbulently, to whirl”, comparing dūkt (“to roar, rage”) and dūkti (“to rage”).[11] Bruguera, the GDLC and Rodamots follow him, Bruguera because the sense and the gender rule out the Latin noun.[12][5][14]

Earliest recorded meaning

Cerverí de Girona, about 1270, rhymes dotz in a poem on the water of baptism and the spring to drink and wash from.[11] Muntaner, about 1330, describes manna rising from a tomb at Ephesus axí con una dou d'aigua ix, as a spring of water flows.[11] Faraudo lists, with a question mark, a dou in Jaume I's Llibre de saviesa (1244).[15]

Semantic evolution

The word means a place where water rises from the ground and the source of a stream.[11][10] The poets of the Renaixença took it up again, Verdaguer among them.[11] It is typical of Eastern Catalan and Roussillon, best rooted in the dioceses of Girona, Vic and Elna, and is not unknown in the rest of the Principality.[11] The old form dou lives on in place names: la Dou de Fontalba near Queralbs, les Dous at Sant Esteve d'en Bas.[11]

Timeline

  • c. 1270 – dotz in Cerverí de Girona.[11]
  • c. 1330 – dou in Muntaner's chronicle.[11][12]
  • 1441 – deu in a document from Banyoles.[11]

Meanings

Noun

  1. A spring, a place where water comes out of the ground; the source of a stream.[10][5][1]
  2. An underground current of water.[3]

Usage notes

Tenir set deus d'una cosa means to have plenty of it.[10]

References

  1. ^ a b c d e f g h i j k l m Wiktionary, the free dictionary, https://en.wiktionary.org
  2. ^ a b c d e Coromines, Joan (1980–2001), Diccionari etimològic i complementari de la llengua catalana, 10 vols., Barcelona: Curial / La Caixa (online ed., Institut d'Estudis Catalans 2024), p. 3, 104
  3. ^ a b c d Alcover, Antoni M.; Moll, Francesc de B. (1930–1962), Diccionari català-valencià-balear, 10 vols., Palma de Mallorca: Moll, p. s.v. deu
  4. ^ a b Bruguera, Jordi (1996), Diccionari etimològic, Barcelona: Enciclopèdia Catalana, p. 279
  5. ^ a b c d e f g Enciclopèdia Catalana, Gran diccionari de la llengua catalana (GDLC), Barcelona: Enciclopèdia Catalana; online edition, https://www.diccionari.cat, p. s.v. deu
  6. ^ Meyer-Lübke, Wilhelm (1935), Romanisches etymologisches Wörterbuch, 3rd ed., Heidelberg: Winter, p. 2497
  7. ^ Corominas, Joan; Pascual, José A. (1980–1991), Diccionario crítico etimológico castellano e hispánico, 6 vols., Madrid: Gredos, p. 2, 493
  8. ^ de Vaan, Michiel (2008), Etymological Dictionary of Latin and the other Italic Languages, Leiden Indo-European Etymological Dictionary Series 7, Leiden; Boston: Brill
  9. ^ a b c Nou glossari general lul·lià (NGGL), Centre de Documentació Ramon Llull, Universitat de Barcelona, https://nggl.ub.edu, p. s.v. deu
  10. ^ a b c d e f g Institut d'Estudis Catalans (2007), Diccionari de la llengua catalana, 2nd ed. (DIEC2), Barcelona: Edicions 62; online edition with later updates, https://dlc.iec.cat, p. s.v. deu
  11. ^ a b c d e f g h i j k l m n o p q Coromines, Joan (1980–2001), Diccionari etimològic i complementari de la llengua catalana, 10 vols., Barcelona: Curial / La Caixa (online ed., Institut d'Estudis Catalans 2024), p. 3, 107
  12. ^ a b c Bruguera, Jordi (1996), Diccionari etimològic, Barcelona: Enciclopèdia Catalana, p. 280
  13. ^ Meyer-Lübke, Wilhelm (1935), Romanisches etymologisches Wörterbuch, 3rd ed., Heidelberg: Winter, p. 2811
  14. ^ Rodamots: cada dia, un mot (online), https://rodamots.cat, p. s.v. deu
  15. ^ Faraudo de Saint-Germain, Lluís, Vocabulari de la llengua catalana medieval, online edition, Barcelona: Institut d'Estudis Catalans, p. s.v. dou

Related etymologies

Cite this entry

“Deu.” Etymologically, 13 Nov. 2026, etymologically.com/ca/deu. Accessed 14 Nov. 2026.

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