Etymologically

Etymology and origin of the Portuguese word fiel

Confidence
Established
Formation
Inherited
First attested
1200s Cantigas de Santa Maria More words from the 13th century
Inherited from
Latin fidelis
Ultimate origin
Latin fidēs
Etymology tree
inherited borrowed derived
Latin fidēs
Catalan fe
French foi
Italian fede
Portuguese fé
Spanish fe
Latin fidēlis
French féal
Italian fedele
Portuguese fiel
Spanish fiel
Romanian fidel
From the same root
Latin fidēiubeō ← fidēs
Latin fidicen ← fidēs
Latin perfidus ← fidēs
English infidel ← fidēlis
Italian fedeltà ← fidēlis
Latin fidēlitās ← fidēlis
Latin fidēliter ← fidēlis
Latin īnfidēlis ← fidēlis

Pronunciation

  • Brazil: /fiˈɛw/, [fiˈɛʊ̯], /ˈfjɛw/[1]
  • Portugal: /ˈfjɛl/, [ˈfjɛɫ][1]
  • Portugal, Southern: /ˈfjɛ.li/[1]

Forms

fiel m or f (plural fiéis)[1]

Etymology

It is inherited from Latin fidēlis (“trustworthy, faithful”), written Old Galician-Portuguese fiel in the oldest texts.[2][3][1] The Latin adjective is formed from fidēs (“faith, trust”) with the suffix -ēlis.[1][4]

The same Latin word is Galician fiel, Asturian fiel, Spanish fiel, Occitan fidèl, Old French feel and Italian fedele.[1][5]

Earliest recorded meaning

The Cantigas de Santa Maria of the 13th century have the adjective in un monge bõo, cast' e mui fiel “a good monk, chaste and very faithful”, and use it as a noun for the Virgin as a guarantor: Fiel bõo tenno “I have a good surety”.[6][2] A charter of 1276 asks men to be uassalos fieles “loyal vassals” to the abbot, and one of 1278 speaks of the fiéés de nostro señor, the faithful of the Lord.[6]

Semantic evolution

Lorenzo's chronology dates the noun to 1152 in the sense “help”, the religious sense “believer” to the 14th–15th century, and the office of a fiel to the 15th.[6] In the Crónica Geral a fiel is a person entrusted with a disputed matter until the case was decided, an overseer of public services, or the judge of a judicial duel; the modern “faithful, believer” is there too.[6] Morais (1789) adds os fieis defuntos “the faithful departed”, those who died in the communion of the Church, and memoria fiel “a memory that does not fail”.[7] Figueiredo (1899) records the noun for an employee who keeps goods, papers or money, an assistant treasurer, and as old usage for arbitrators.[8] Houaiss adds the nautical senses and, in Rio Grande do Sul, the leather loop at the end of a whip handle.[2][9]

Timeline

  • 13th century – fiel in the Cantigas de Santa Maria.[6][2]
  • 1276 – uassalos fieles in a charter.[6]
  • 1416 – fiel in the Vida do Cativo Monge Confesso.[10]
  • 1569 – Cardoso translates it with Latin fidus and fidelis.[11]
  • 1572 – first record of the derivative fidelidade.[3]
  • 1789 – Morais records os fieis defuntos.[7]
  • 1899 – Figueiredo lists the noun for a keeper of goods and an assistant treasurer.[8]

Meanings

Adjective

  1. loyal, faithful; keeping one's word and not betraying a trust; of an animal, devoted to its owner.[2][12][1]
  2. Faithful to one's partner, having no other lover.[2][12]
  3. Honest (honesto), upright: um empregado fiel.[2][12]
  4. Believing, having faith (fé);[2][12] (religion) professing a religion.[2][12]
  5. Constant (constante), steadfast in one's principles, habits or tastes: fiel às suas ideias.[2][12]
  6. That does not fail, reliable: memória fiel.[2][7]
  7. accurate, true to the facts or to a model: uma tradução fiel.[2][1]

Noun

  1. A believer, a follower of a religion;[2][1][8] (in the plural) the faithful, a church's members.[2][1][8]
  2. An employee in charge of goods, documents, money or valuables; an assistant treasurer (tesoureiro).[13][8][14]
  3. (nautical) A sailor in charge of a particular store or service on a ship.[2]
  4. (Rio Grande do Sul) The leather loop at the end of a relho or rebenque, through which the hand is passed.[2][9]

Word family

  • fielmente

Usage notes

The fiel of a balance, the needle or tongue that shows whether the beam is level (fiel da balança), is a separate noun, recorded from the 16th century.[2] Houaiss takes it from Spanish fiel de la balanza (1490), which Corominas explains from Latin filum “thread”, used for this pointer by Isidore of Seville: in the phrase fil de la balanza the old form fil was confused by folk etymology with the adjective fiel.[2][15][16] Figueiredo had derived it from fio “thread”.[8] Figuratively it means a guiding principle.[2]

References

  1. ^ a b c d e f g h i j k Wiktionary, the free dictionary, https://en.wiktionary.org
  2. ^ a b c d e f g h i j k l m n o p q r s Houaiss, Antônio; Villar, Mauro de Salles (2001), Dicionário Houaiss da língua portuguesa, Rio de Janeiro: Objetiva, p. s.v. fiel
  3. ^ a b Cunha, Antônio Geraldo da (2010), Dicionário etimológico da língua portuguesa, 4th ed., Rio de Janeiro: Lexikon, p. s.v. fiel
  4. ^ Glare, P. G. W., ed. (2012), Oxford Latin Dictionary, 2nd ed., Oxford: Oxford University Press, p. s.v. fidēlis
  5. ^ Nascentes, Antenor (1955), Dicionário etimológico da língua portuguesa, vol. 1: Nomes comuns, Rio de Janeiro (1st ed. 1932, preface by W. Meyer-Lübke), p. 215
  6. ^ a b c d e f Instituto da Lingua Galega, Dicionario de dicionarios do galego medieval (DDGM), ed. Ernesto González Seoane, Santiago de Compostela: Universidade de Santiago de Compostela, https://ilg.usc.gal/ddgm, p. s.v. fiel
  7. ^ a b c Silva, António de Morais (1789), Diccionario da lingua portugueza composto pelo padre D. Rafael Bluteau, reformado, e accrescentado, 2 vols., Lisboa: Simão Thaddeo Ferreira, p. 1, 614
  8. ^ a b c d e f Figueiredo, Cândido de (1899), Novo diccionário da língua portuguesa, 1st ed., 2 vols., Lisboa: Tavares Cardoso & Irmão, p. s.v. fiel
  9. ^ a b Schlee, Aldyr Garcia (2019), Dicionário da Cultura Pampeana Sul-Rio-Grandense, 2 vols., Pelotas: Fructos do Paiz, p. s.v. fiel
  10. ^ Centro de Linguística da Universidade de Lisboa, CTA – Corpus de Textos Antigos, https://teitok.clul.ul.pt/cta, p. s.v. fiel
  11. ^ Cardoso, Jerónimo (1569–1570), Dictionarium ex lusitanico in latinum sermonem, Lisboa: João Álvares (CLP transcription, Universidade de Aveiro), p. s.v. fiel
  12. ^ a b c d e f Ferreira, Aurélio Buarque de Holanda, Novo dicionário Aurélio da língua portuguesa, digital edition, p. s.v. fiel
  13. ^ Academia das Ciências de Lisboa, Dicionário da Língua Portuguesa, revised online edition (2023–) of the Dicionário da Língua Portuguesa Contemporânea (2001), https://dicionario.acad-ciencias.pt, p. s.v. fiel
  14. ^ Michaelis: Moderno Dicionário da Língua Portuguesa, São Paulo: Melhoramentos (online as Michaelis Dicionário Brasileiro da Língua Portuguesa, https://michaelis.uol.com.br), p. s.v. fiel
  15. ^ Corominas, Joan (1973), Breve diccionario etimológico de la lengua castellana, 3rd ed., Madrid: Gredos, p. s.v. fiel
  16. ^ Corominas, Joan; Pascual, José A. (1980–1991), Diccionario crítico etimológico castellano e hispánico, 6 vols., Madrid: Gredos, p. 2, 888

Related etymologies

Cite this entry

“Fiel.” Etymologically, 15 Nov. 2026, etymologically.com/pt/fiel. Accessed 16 Nov. 2026.

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