Etymologically

Etymology and origin of the Spanish word sincero

Confidence
Established
Formation
Borrowing
First attested
c. 1235 Berceo, Vida de San Millán More words from the 13th century
Borrowed from
Latin sincerus
Ultimate origin
Latin sincērus
Etymology tree
inherited borrowed derived
Latin sincērus
Italian sincero
Spanish sincero
From the same root
English sincere ← sincērus
Latin sincere ← sincērus
Latin sincēritās ← sincērus

Pronunciation

  • /sinˈθeɾo/, [sĩn̟ˈθe.ɾo], /sinˈseɾo/[1]

Forms

sincero (feminine sincera, masculine plural sinceros, feminine plural sinceras)[1]

Etymology

It is a learned word, borrowed from Latin sincērus (“sound, whole, pure”), first found in Berceo.[2][3][4][1] De Vaan reconstructs Proto-Italic *sm-kair/so- (“whole, intact”), with the first part sem- (“one”), and connects the second with an adjective meaning “whole” seen in caerimōnia and perhaps in caelum; he calls the further link with Proto-Indo-European *keh₂i-r/so- (“whole”) uncertain.[5] Wiktionary gives that view beside an older one that joins *sem- with *ḱer- (“to grow”).[1] Monlau repeated the ancient explanation “without wax”, said of honey free of comb.[6]

The Latin word survives in popular form in Catalan sencer (“whole, intact”), recorded from 1271, and in Aragonese sencero (“intact”).[7][8] Learned forms like the Spanish one are Italian sincero and French sincère, borrowed in 1441.[1][9]

Earliest recorded meaning

Corominas dates the first record to Berceo, about 1220–1250; the DEMel places it in the Vida de San Millán of about 1235.[2][3][10] The word was rare in the Middle Ages: Alfonso de Palencia defined it as a Latin word with no Castilian equivalent, and Nebrija, Percyvall and Covarrubias lack it.[2]

Semantic evolution

Corominas finds it again in 1589, in Hernando de Castillo;[11] Oudin listed it in 1607 with the senses “simple, pure and clean”, and Cervantes used it repeatedly in the Quijote.[2][11] The Diccionario de Autoridades defines it as “pure, simple and without duplicity”.[12] The physical sense “pure, unmixed” was marked as obsolete by the Academy by 1843, and the DLE keeps it as disused; only the moral sense lives on.[13][4] Since the 17th century the word has spread widely, and it is common in the speech of educated people.[2] In 1579 a Havana inventory used sinseras of empty jars, meaning sound or intact.[14]

Timeline

  • c. 1235 – Berceo uses the word in the Vida de San Millán.[10][3]
  • 1272 – it appears in the General Estoria.[15]
  • 1579 – first record in the Americas, in Havana, of sound jars.[14]
  • 1607 – sinceridad is first recorded, in Oudin.[3][2]
  • 1677 – sincerar is first recorded.[3]
  • 1726–1739 – the Diccionario de Autoridades defines it.[12]

Meanings

Adjective

  1. sincere, honest: speaking or acting without pretence: Te voy a ser sincero: no me gustó.[4][1][16]
  2. Genuine, heartfelt (of feelings or words): mi más sincero agradecimiento.[17]
  3. (obsolete) Pure (puro), unmixed.[4]

Word family

  • sinceramente
  • sinceridad
  • sincerar
  • Catalan sencer
  • Latin sincērus

Usage notes

Iriarte and Forner sometimes stressed it on the first syllable, as popular speech did in Chile;[18] Román held to the stress of Latin, of Cervantes and of the Academy, sincero with stress on the second syllable.[18]

References

  1. ^ a b c d e f Wiktionary, the free dictionary, https://en.wiktionary.org
  2. ^ a b c d e f Corominas, Joan; Pascual, José A. (1980–1991), Diccionario crítico etimológico castellano e hispánico, 6 vols., Madrid: Gredos, p. 5, 255
  3. ^ a b c d e Corominas, Joan (1973), Breve diccionario etimológico de la lengua castellana, 3rd ed., Madrid: Gredos, p. s.v. sincero
  4. ^ a b c d Real Academia Española; Asociación de Academias de la Lengua Española (2014–), Diccionario de la lengua española, 23rd ed., online version 23.8, https://dle.rae.es, p. s.v. sincero
  5. ^ de Vaan, Michiel (2008), Etymological Dictionary of Latin and the other Italic Languages, Leiden Indo-European Etymological Dictionary Series 7, Leiden; Boston: Brill
  6. ^ Monlau, Pedro Felipe (1856), Diccionario etimológico de la lengua castellana (ensayo), Madrid: Imprenta de la Sociedad Literaria y Tipográfica, p. 412
  7. ^ 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. 7, 783
  8. ^ García de Diego, Vicente (1985), Diccionario etimológico español e hispánico, 2nd ed., Madrid: Espasa-Calpe (1st ed. 1954), p. 6142
  9. ^ Rey, Alain, ed. (1992), Dictionnaire historique de la langue française, Paris: Le Robert
  10. ^ a b Diccionario del Español Medieval electrónico (DEMel), data publication 2026 (CC BY-SA), Universität Rostock, p. s.v. sincero
  11. ^ a b Cejador y Frauca, Julio (1905–1906), La lengua de Cervantes: gramática y diccionario de la lengua castellana en El ingenioso hidalgo don Quijote de la Mancha, 2 vols., Madrid: Jaime Ratés, p. 1037
  12. ^ a b Real Academia Española (1726–1739), Diccionario de la lengua castellana (Diccionario de Autoridades), 6 vols., Madrid: Francisco del Hierro, p. 6, 118
  13. ^ Real Academia Española (1843), Diccionario de la lengua castellana, 9th ed., Madrid: Imprenta de D. Francisco María Fernández, p. 669
  14. ^ a b Boyd-Bowman, Peter (2003), Léxico hispanoamericano 1493–1993, ed. Ray Harris-Northall and John J. Nitti, New York: Hispanic Seminary of Medieval Studies, p. s.v. sincero
  15. ^ Hispanic Seminary of Medieval Studies (2026), Old Spanish Textual Archive (OSTA): semi-paleographic transcriptions of Old Spanish texts, ed. Francisco Gago Jover et al., https://www.hispanicseminary.org, p. s.v. sincero
  16. ^ Moliner, María (2007), Diccionario de uso del español, 3rd ed., Madrid: Gredos, p. s.v. sincero
  17. ^ Battaner Arias, Paz (dir.) (2017), Diccionario general de la lengua española VOX, Barcelona: Larousse Editorial, p. s.v. sincero
  18. ^ a b Román, Manuel Antonio (1901–1918), Diccionario de chilenismos y de otras voces y locuciones viciosas, 5 vols., Santiago de Chile: Imprenta de San José, p. 271

Related etymologies

Cite this entry

“Sincero.” Etymologically, 7 Nov. 2026, etymologically.com/es/sincero. Accessed 7 Nov. 2026.

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