Etymologically

Etymology and origin of the Spanish word firmar

Confidence
Established
Formation
Inherited
First attested
c. 950–1000 Glosas Silenses More words from the 10th century
Inherited from
Latin firmo
Ultimate origin
Proto-Indo-European *dʰer-
Etymology tree
inherited borrowed derived
Latin fīrmus
French ferme
Italian fermo
Latin firmō
French fermer
Italian fermare
Spanish firmar
Italian firmare
From the same root
Latin firmē ← fīrmus
Latin firmitās ← fīrmus
Latin firmiter ← fīrmus
Latin firmitūdō ← fīrmus
Latin īnfirmus ← fīrmus
English firm ← firmō
Italian firma ← firmō
Latin affirmō ← firmō
Latin cōnfirmō ← firmō
Latin firmāmentum ← firmō
Latin offirmō ← firmō
Spanish firma ← firmō
French enfermer ← fermer
French refermer ← fermer
Italian fermata ← fermare

Pronunciation

  • /fiɾˈmaɾ/, [fiɾˈmaɾ][1]

Forms

firmar (first-person singular present firmo, first-person singular preterite firmé, past participle firmado)[1] The popular doublet hirmar “to make firm, fasten” survives in Navarre, and jirmar in Cantabria and Andalusia.[2]

Etymology

It continues inherited from Latin firmō (“to make firm, strengthen, confirm”), a derivative of firmus (“firm, stable”).[3][1][4][5] Corominas lists it among the derivatives of firme and explains why its ⟨f-⟩ did not turn into ⟨h-⟩.[6] In this word of moral meaning the pronunciation of the educated classes prevailed, helped by the heavy use of the verb and of ⟨firme⟩ “witness, guarantor” in notarial and legal language.[6] He rejects the idea that the word is a true learned borrowing.[6] Wiktionary and García de Diego do treat it as learned, a doublet of the popular hirmar.[1][2]

The same Latin verb is Portuguese firmar, Galician firmar, Catalan fermar, Occitan fermar, French fermer (“to close”) and Italian fermare.[7][8] Basque bermatu (“to guarantee”) comes from the related Navarro-Aragonese ferme (“guarantor”).[6]

De Vaan derives the Latin adjective from *fermo- and Proto-Indo-European *dʰer- (“to hold”), the root of Sanskrit and Avestan verbs meaning “to hold”.[9]

Earliest recorded meaning

Corominas's first record is in the Glosas Silenses, of the second half of the 10th century.[6][10] The early sense was “to affirm, assert”: in Berceo David lo firma esto “David affirms this”.[11] Alfonso X's prose has both “to make firm, confirm” and “to sign”.[12]

Semantic evolution

Latin “to make firm” had become “to declare on oath, conclude a treaty” in Medieval Latin.[13] In the subscriptions of charters firmare manu sua “to confirm with one's own hand” was one of the commonest formulas.[14] From confirming a document by one's signature the verb came to mean “to sign”.[4] The noun firma is recorded in a charter of 1206.[6]

Nebrija gives both firmo, fundo, stabilio and, for signing a document, subscribo.[15] Autoridades has “to sign” as the main sense, “to attest” as old, and “to prop up, make firm”.[16] The Academy's dictionary of 1817 marks the older sense as obsolete and records firmar en blanco “to sign a blank paper” and no estar para firmar “to be drunk”.[17] The reflexive “to sign oneself (with a name or title)” follows in 1869.[18]

Modern Spanish uses it for joining a team or company by contract, and colloquially firmaría por means “I would settle for”.[19][20] In Aragon it means hiring a worker or servant for a year.[19] In the Dominican Republic and Puerto Rico it means “to hire”, after English to sign on.[21][22] In Mexico it is a humorous word for urinating.[22][21][23]

Timeline

  • c. 950–1000 – the Glosas Silenses.[6][10]
  • 1206 – the noun firma in a charter.[6][10]
  • 1220–1250 – Berceo uses it for “to affirm”.[11]
  • 1254 – Alfonso X's prose uses it for “to confirm” and “to sign”.[12]
  • c. 1252–1270 – the Setenario spells it ffirmar.[24]
  • c. 1495 – Nebrija gives firmo and, for a document, subscribo.[15]
  • 1528 – the first record from the Americas, in Nicaragua: firmada de ambos.[25]
  • 1726–1739 – Autoridades defines it as putting one's signature to a letter or document.[16]
  • 1817 – the Academy records firmar en blanco and no estar para firmar.[17]
  • 1899 – the Academy gives the etymology from Latin firmare.[26]

Meanings

Verb

  1. To sign (a letter, document, law): Firme aquí, por favor.[3][1]
  2. (reflexive) To sign oneself with a particular name or title.[3][19]
  3. (informal, with por) To sign a contract with a team or company.[19][20]
  4. (informal, with por) To be ready to settle for something.[19]
  5. (obsolete) To affirm, make firm and secure.[3]
  6. (Aragon) To hire a worker or servant, usually for a year.[19]
  7. (Dominican Republic, Puerto Rico) To hire.[22][21]
  8. (Mexico, humorous) To urinate.[23]

Word family

  • firme
  • afirmar
  • confirmar
  • firmamento
  • hirmar
  • Latin firmus
  • French fermer

Usage notes

Firmar en blanco is to sign a paper that is wholly or partly unwritten, so that someone else can fill it in.[3] No estar para firmar colloquially means “to be drunk”.[3]

References

  1. ^ a b c d e Wiktionary, the free dictionary, https://en.wiktionary.org
  2. ^ a b García de Diego, Vicente (1985), Diccionario etimológico español e hispánico, 2nd ed., Madrid: Espasa-Calpe (1st ed. 1954), p. s.v. firmare
  3. ^ a b c d e f 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. firmar
  4. ^ a b Gómez de Silva, Guido (1988), Breve diccionario etimológico de la lengua española, México: Fondo de Cultura Económica / El Colegio de México, p. 309
  5. ^ Glare, P. G. W., ed. (2012), Oxford Latin Dictionary, 2nd ed., Oxford: Oxford University Press, p. s.v. firmō
  6. ^ a b c d e f g h Corominas, Joan; Pascual, José A. (1980–1991), Diccionario crítico etimológico castellano e hispánico, 6 vols., Madrid: Gredos, p. 2, 902
  7. ^ Meyer-Lübke, Wilhelm (1935), Romanisches etymologisches Wörterbuch, 3rd ed., Heidelberg: Winter, p. s.v. firmare
  8. ^ Rey, Alain, ed. (1992), Dictionnaire historique de la langue française, Paris: Le Robert, p. s.v. fermer
  9. ^ de Vaan, Michiel (2008), Etymological Dictionary of Latin and the other Italic Languages, Leiden Indo-European Etymological Dictionary Series 7, Leiden; Boston: Brill
  10. ^ a b c Corominas, Joan (1973), Breve diccionario etimológico de la lengua castellana, 3rd ed., Madrid: Gredos, p. s.v. firme
  11. ^ a b Lanchetas, Rufino (1900), Gramática y vocabulario de las obras de Gonzalo de Berceo, Madrid: Sucesores de Rivadeneyra, p. 372
  12. ^ 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. firmar
  13. ^ Niermeyer, J. F. (1976), Mediae Latinitatis Lexicon Minus, Leiden: Brill, p. s.v. firmare
  14. ^ du Cange, Charles du Fresne, et al. (1883–1887), Glossarium mediae et infimae latinitatis, augmented ed. by Léopold Favre, Niort: L. Favre, p. s.v. firmare
  15. ^ a b Lleal, Coloma (dir.), DICCA-XV: Diccionario del castellano del siglo XV en la Corona de Aragón, Barcelona: Universitat de Barcelona, Grup d'Estudis d'Història de la Llengua (GHCL), https://ghcl.ub.edu/diccaxv, p. s.v. firmar
  16. ^ a b Real Academia Española (1726–1739), Diccionario de la lengua castellana (Diccionario de Autoridades), 6 vols., Madrid: Francisco del Hierro, p. 3, 757
  17. ^ a b Real Academia Española (1817), Diccionario de la lengua castellana, 5th ed., Madrid: Imprenta Real, p. 417
  18. ^ Real Academia Española (1869), Diccionario de la lengua castellana, 11th ed., Madrid: Imprenta de Don Manuel Rivadeneyra, p. 361
  19. ^ a b c d e f Moliner, María (2007), Diccionario de uso del español, 3rd ed., Madrid: Gredos, p. s.v. firmar
  20. ^ a b Battaner Arias, Paz (dir.) (2017), Diccionario general de la lengua española VOX, Barcelona: Larousse Editorial, p. s.v. firmar
  21. ^ a b c Academia Puertorriqueña de la Lengua Española; Universidad de Puerto Rico, Tesoro lexicográfico del español de Puerto Rico, https://tesoro.pr, p. s.v. firmar
  22. ^ a b c Academia Dominicana de la Lengua; Instituto Guzmán Ariza de Lexicografía (2024), Diccionario del español dominicano, 2nd ed., online at https://ded.igalex.org, p. s.v. firmar
  23. ^ a b Asociación de Academias de la Lengua Española (2010), Diccionario de americanismos, Lima: Santillana; online at https://www.asale.org/damer, p. s.v. firmar
  24. ^ Diccionario del Español Medieval electrónico (DEMel), data publication 2026 (CC BY-SA), Universität Rostock, p. s.v. firmar
  25. ^ 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. firmar
  26. ^ Real Academia Española (1899), Diccionario de la lengua castellana, 13th ed., Madrid: Imprenta de los Sres. Hernando y Compañía, p. 462

Related etymologies

Cite this entry

“Firmar.” Etymologically, 7 Nov. 2026, etymologically.com/es/firmar. Accessed 7 Nov. 2026.

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