Etymologically

Etymology and origin of the Spanish word espurio

Confidence
Established
Formation
Borrowing
First attested
c. 1260 Alfonso X, Siete Partidas More words from the 13th century
Borrowed from
Latin spurius
Ultimate origin
Latin spurius
Etymology tree
inherited borrowed derived
Latin spurius
English spurious
Spanish espurio

Pronunciation

  • /esˈpuɾjo/, [esˈpu.ɾjo][1]

Forms

espurio (feminine espuria, masculine plural espurios, feminine plural espurias)[1]

Etymology

It is borrowed from Latin spurius (“bastard, illegitimate”), a learned word.[2][3][4][1] Romanian spuriu continues the same Latin word.[5]

The Latin word was a legal term for a child of unknown father, and also a personal name.[6][7] The Oxford Latin Dictionary considers it probably Etruscan, and Gómez de Silva compares the Etruscan family name of similar form and Latin spurcus (“dirty, impure”).[6][7] Wiktionary gives as alternatives the Etruscan word for “public” and a derivation from Proto-Indo-European *sper- (“to scatter”).[1] The Roman jurist Gaius had explained it from Greek σποράδην (sporádēn, “scattered”) or as “sons without a father”, and Covarrubias repeated the Greek etymology.[6][8]

Earliest recorded meaning

The first record is in Alfonso X's Siete Partidas (c. 1256–1265), which explain that a son called espurio may not inherit with the legitimate one, and define him as the child of a woman who gives herself to many.[2][3][9][10]

Semantic evolution

For centuries the word was a legal term for a child of uncertain father: Covarrubias in 1611 and Autoridades in 1732 define it so, and Autoridades adds that the Romans wrote it in abbreviation as S. P., read sine patre.[8][10] Autoridades also gives a figurative sense, “adulterated, corrupt, false”, quoting Sigüenza on letters falsely attributed to Saint Jerome, and the astronomers' sombra espuria for the penumbra of a lunar eclipse.[10] From 1843 the Academy defined the first sense simply as “bastard”.[11] Today the figurative sense prevails: Moliner applies it to anything lacking legitimacy or authenticity, and Vox gives only “false, illegitimate”.[12][13] In the Americas hijos espurios are recorded from 1570 in Nueva Galicia.[14]

Timeline

  • c. 1256–1265 – Alfonso X's Siete Partidas.[2][3][9]
  • 1570 – first record in the Americas, in Nueva Galicia.[14]
  • 1604 – the form espúreo in a printing of Lope de Vega's comedies.[2][3]
  • 1611 – Covarrubias explains hijo espurio and its Greek etymology.[8]
  • 1732 – the Diccionario de Autoridades adds the figurative sense “false”.[10]
  • 1884 – the Academy's dictionary first gives the etymology from Latin.[15]

Meanings

Adjective

  1. Bastard (bastardo), illegitimate: hijo espurio.[4][12]
  2. spurious, false; not genuine or authentic: Detectaron varios datos espurios en el informe.[4][13][12][1]

Usage notes

The form espúreo, a hypercorrection, is widespread and appears as early as a 1604 printing of Lope's comedies;[2][3] Corominas suspects that many of its instances are printers' errors.[2][3]

References

  1. ^ a b c d e 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. 2, 754
  3. ^ a b c d e f Corominas, Joan (1973), Breve diccionario etimológico de la lengua castellana, 3rd ed., Madrid: Gredos, p. s.v. espurio
  4. ^ a b c 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. espurio
  5. ^ Meyer-Lübke, Wilhelm (1935), Romanisches etymologisches Wörterbuch, 3rd ed., Heidelberg: Winter, p. 8195
  6. ^ a b c Glare, P. G. W., ed. (2012), Oxford Latin Dictionary, 2nd ed., Oxford: Oxford University Press, p. s.v. spurius
  7. ^ a b Gómez de Silva, Guido (1988), Breve diccionario etimológico de la lengua española, México: Fondo de Cultura Económica / El Colegio de México, p. s.v. espurio
  8. ^ a b c Covarrubias Orozco, Sebastián de (1611), Tesoro de la lengua castellana o española, Madrid: Luis Sánchez (Biblioteca Wordkers transcription, CC BY 4.0), p. 798
  9. ^ a b Diccionario del Español Medieval electrónico (DEMel), data publication 2026 (CC BY-SA), Universität Rostock, p. s.v. espurio
  10. ^ a b c d Real Academia Española (1726–1739), Diccionario de la lengua castellana (Diccionario de Autoridades), 6 vols., Madrid: Francisco del Hierro, p. 3, 615
  11. ^ Real Academia Española (1843), Diccionario de la lengua castellana, 9th ed., Madrid: Imprenta de D. Francisco María Fernández, p. 321
  12. ^ a b c Moliner, María (2007), Diccionario de uso del español, 3rd ed., Madrid: Gredos, p. s.v. espurio
  13. ^ a b Battaner Arias, Paz (dir.) (2017), Diccionario general de la lengua española VOX, Barcelona: Larousse Editorial, p. s.v. espurio
  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. espúreo
  15. ^ Real Academia Española (1884), Diccionario de la lengua castellana, 12th ed., Madrid: Imprenta de D. Gregorio Hernando (the first Academy edition with etymologies), p. 462

Related etymologies

Cite this entry

“Espurio.” Etymologically, 7 Nov. 2026, etymologically.com/es/espurio. Accessed 7 Nov. 2026.

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