Etymologically

Etymology and origin of the Spanish word fiel

Confidence
Established
Formation
Inherited
First attested
c. 1140 Cantar de mio Cid More words from the 12th century
Inherited from
Latin fidelis via Old Spanish
Ultimate origin
Latin fidēs
Etymology tree
inherited borrowed derived
Latin fidēs
French foi
Italian fede
Spanish fe
Latin fidēlis
Spanish fiel
From the same root
Latin fidēiubeō ← fidēs
Latin fidicen ← fidēs
Latin perfidus ← fidēs
English infidel ← fidēlis
Latin fidēlitās ← fidēlis
Latin fidēliter ← fidēlis
Latin īnfidēlis ← fidēlis

Pronunciation

  • /ˈfjel/, [ˈfjel][1]

Forms

fiel m or f (masculine and feminine plural fieles, superlative fidelísimo)[1] An older form fidel is found in early charters and in Berceo.[2]

Etymology

It is inherited from Old Spanish fiel, inherited from Latin fidēlis (“faithful”).[2][3][4][1] Corominas explains the kept ⟨f⟩ as in fe: the word was pronounced without a diphthong until late, so neither the diphthong nor a wish to avoid a clash with hiel “gall”, as Steiger thought, is the reason.[2] The Latin adjective is formed from fidēs (“faith, trust”) with the suffix -ēlis.[1][5]

The same Latin word is Portuguese fiel, Galician fiel, Asturian fiel, Italian fedele and Occitan fidèl.[1][6][7]

Earliest recorded meaning

The Cantar de mio Cid (c. 1140, in a 14th-century copy) has the word in the Cid's greeting: ¡Venides, Martín Antolínez, el mio fiel vassallo! “You have come, Martín Antolínez, my faithful vassal!”.[8][2] The first record in a contemporary manuscript is a will of the 13th century, which pays for masses for los fieles de Dios “God's faithful”.[8]

Semantic evolution

Alfonso X's prose uses the word for loyal people and, as a noun, for Christians who live by the precepts of the Church; one passage applies it to those who follow the law of the Old Testament.[9] The old noun for faithfulness was fieldad, in a charter of 1206 and still in Nebrija; fidelidad, from Latin, appears in 1490.[2] Nebrija in 1495 glosses fiel both as a person one trusts and as one who believes in the faith.[10]

Covarrubias defines the word as one who keeps faith and loyalty, and Autoridades adds a thing that works as it should, such as a clock that keeps time, and a Catholic Christian, por antonomasia.[11][12][13] Today it also means “exact, true to the facts”, as of a copy or a memory, and a believer of any religion.[4]

Timeline

  • c. 1140 – the Cantar de mio Cid (in a 14th-century copy).[8][3]
  • 1206 – the noun fieldad “fidelity” in a charter.[2]
  • 1254 – Alfonso X's Judizios de las estrellas says farm workers are thieves and not fieles under a bad sign.[9]
  • 1490 – the learned fidelidad.[2][3]
  • c. 1495 – Nebrija's two glosses.[10]
  • 1611 – Covarrubias defines it and also names the pointer of a balance fiel.[11]
  • 1732 – Autoridades records fiel for a Catholic Christian.[12]

Meanings

Adjective

  1. faithful, loyal: true to one's word, affections and duties, not betraying the trust placed in one.[4][1]
  2. Exact, true to the facts: una traducción fiel del original.[4]
  3. Having the qualities its use requires; reliable.[4]
  4. (also as a noun) A Christian who keeps the rules of the Church; a believer of a religion: los fieles llenaban la iglesia.[4][1]

Word family

  • fielmente

Usage notes

A separate word fiel, the pointer of a balance, comes from the obsolete fil “pointer of a balance”, from Late Latin filum “thread”, the name Isidore used for it; in the phrase fil de la balanza it was confused with fiel “faithful”, and both fil and fiel are first found in Alonso de Palencia in 1490.[14][15][4] By the same image the word named officials who checked weights and measures (1495) and the fiel ejecutor (1499).[15] In Old Spanish and in Asturian fiel is also the gall, hiel.[16][7]

References

  1. ^ a b c d e f g Wiktionary, the free dictionary, https://en.wiktionary.org
  2. ^ a b c d e f g Corominas, Joan; Pascual, José A. (1980–1991), Diccionario crítico etimológico castellano e hispánico, 6 vols., Madrid: Gredos, p. 2, 877
  3. ^ a b c Corominas, Joan (1973), Breve diccionario etimológico de la lengua castellana, 3rd ed., Madrid: Gredos, p. s.v. fe
  4. ^ a b c d e f g 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. fiel
  5. ^ Glare, P. G. W., ed. (2012), Oxford Latin Dictionary, 2nd ed., Oxford: Oxford University Press
  6. ^ Cunha, Antônio Geraldo da (2010), Dicionário etimológico da língua portuguesa, 4th ed., Rio de Janeiro: Lexikon, p. 1555
  7. ^ a b Academia de la Llingua Asturiana (2000), Diccionariu de la Llingua Asturiana, Uviéu: ALLA; online at https://mas.academiadelallingua.com/diccionariu, p. s.v. fiel
  8. ^ a b c Real Academia Española (2013–), Corpus del Diccionario histórico de la lengua española (CDH), version 3.1, https://apps.rae.es/CNDHE, p. s.v. fiel
  9. ^ a b Kasten, Lloyd A.; Nitti, John J.; Gago Jover, Francisco (2002–), Diccionario de la prosa castellana del Rey Alfonso X, New York: Hispanic Seminary of Medieval Studies (electronic edition 2024), p. s.v. fiel
  10. ^ a b Nebrija, Antonio de (1513), Vocabulario español-latino, Salamanca, ed. Marina Vidal Díez (2007), Biblioteca Virtual Miguel de Cervantes, p. 353
  11. ^ a b Covarrubias Orozco, Sebastián de (1611), Tesoro de la lengua castellana o española, Madrid: Luis Sánchez (Biblioteca Wordkers transcription, CC BY 4.0), p. 843
  12. ^ a b Real Academia Española (1726–1739), Diccionario de la lengua castellana (Diccionario de Autoridades), 6 vols., Madrid: Francisco del Hierro, p. 3, 745
  13. ^ Real Academia Española (1726–1739), Diccionario de la lengua castellana (Diccionario de Autoridades), 6 vols., Madrid: Francisco del Hierro, p. s.v. fiel
  14. ^ Corominas, Joan; Pascual, José A. (1980–1991), Diccionario crítico etimológico castellano e hispánico, 6 vols., Madrid: Gredos, p. 2, 888
  15. ^ a b Corominas, Joan (1973), Breve diccionario etimológico de la lengua castellana, 3rd ed., Madrid: Gredos, p. s.v. fiel
  16. ^ Cejador y Frauca, Julio (1929), Vocabulario medieval castellano, Madrid: Librería y Casa Editorial Hernando, p. 252

Related etymologies

Cite this entry

“Fiel.” Etymologically, 7 Nov. 2026, etymologically.com/es/fiel. Accessed 7 Nov. 2026.

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