Etymologically

Etymology and origin of the Spanish word auto

auto1 deed; judicial decree; religious play

Confidence
Established
Formation
Inherited
First attested
1254 a document of Alfonso X
Inherited from
Latin actus via Old Spanish
Ultimate origin
Latin agō
Etymology tree of auto1
inherited borrowed derived
Latin agō
French agir
Latin āctus
Spanish auto
English act
Italian atto
From the same root · auto1
Latin abigō ← agō
Latin āctiō ← agō
Latin āctitō ← agō
Latin āctīvus ← agō
Latin āctrīx ← agō
Latin adigō ← agō
Latin age ← agō
Latin agēns ← agō
Latin agilis ← agō
Latin agitō ← agō
Latin agmen ← agō
Latin agōnia ← agō
Latin ambāgēs ← agō
Latin ambigō ← agō
Latin aurīga ← agō
Latin circumago ← agō
Latin cōgō ← agō
Latin dego ← agō
Latin exāmen ← agō
Latin exigō ← agō
Latin exīlis ← agō
Latin fatīgō ← agō
Latin indāgō ← agō
Latin nāvigō ← agō
Latin peragō ← agō
Latin prōdigō ← agō
Latin reagō ← agō
Latin redigō ← agō
Latin rēmex ← agō
Latin subigō ← agō
See all derived words →

Pronunciation

  • /ˈauto/, [ˈau̯.t̪o][1]

Forms

auto m (plural autos)[1] Old Spanish also wrote abtos and avtos.[2] Spanish documents from the Americas of the 1510s–1520s have abcto and abto.[3]

Etymology

The word for a deed or a judicial decree is inherited from Old Spanish auto, inherited from Latin āctus (“a doing; an act”).[1][4][5] It came into Spanish by a semi-learned route, and the DCECH calls it the semi-learned doublet of acto, the learned form of the same Latin word.[4][6][1] The Diccionario de Autoridades notes that the old form was spelt with ⟨c⟩, like the learned word, and that the ⟨c⟩ later changed to ⟨u⟩.[7] In legal language the learned form has been used as a synonym from Alfonso X to the present.[4]

The same Latin word gave Portuguese auto with the senses “decree” and “religious play”, as well as Italian atto and French acte.[8] Galician has ato “service for a dead person”.[4]

The Latin noun is an action noun formed from agō (“to do, drive”) with the suffix -tus.[9][1] De Vaan derives the verb from Proto-Indo-European *h₂eǵ- (“to drive, lead”).[10]

Earliest recorded meaning

The DEMel's earliest records are autos in a document of Alfonso X of 1254 and avtos in the Dotrinal of Maestre Jacobo (1252–1289).[2] Corominas dates the word to about 1300, from the Gran conquista de Ultramar.[4][5] There it means a written deed: „E los otorgamientos fechos de amas las partes, fizieron luego sus autos e firmezas de casamiento” “and when both sides had consented, they at once drew up their deeds and pledges of marriage”.[11][12] The CDH has this text only in a print of 1503.[12]

Semantic evolution

In the 15th century auto meant a judicial decision, as in the Celestina (1499), and an act, especially a ceremony.[11] Covarrubias in 1611 defined it as a legal term for a judge's decree, and as the play on a sacred theme performed at Corpus Christi and other feasts; he also described the auto de fe, in which the Inquisition read out in public the offences and sentences of those it had condemned.[13] In the Quijote the autos para el día de Dios are the sacramental plays of Corpus Christi.[14]

Terreros listed several kinds of judicial auto, among them the auto interlocutorio and the auto definitivo.[15] The Academy marked the sense “act, deed” as old in 1770, and its 1899 edition gives the plural the sense “the proceedings of a lawsuit or case”.[16][17] The sense “act” survives in Aragon.[18] By extension, an auto de fe is also the burning of something judged harmful or useless.[19][18]

Timeline

  • 1254 – autos in a document of Alfonso X.[2]
  • c. 1295 – the Gran conquista de Ultramar uses it for a written deed (known from the print of 1503).[11][12]
  • 1397 – first CDH record without a later copy, in a book of ordinances.[12]
  • 1499 – the Celestina uses it for a judicial decision.[11]
  • 1527 – first record in the Americas, in Nicaragua.[3]
  • 1611 – Covarrubias describes the auto of Corpus Christi and the auto de fe.[13]
  • 1770 – the Academy marks the sense “act, deed” as old.[16]

Meanings

Noun

  1. (literature) A short play of the Middle Ages or the Renaissance on a religious or secular theme.[19][1]
  2. (law) A reasoned court ruling that decides a secondary, preliminary or incidental question and does not require a full judgment.[19][1]
  3. (dated) An act or deed.[19]
  4. (law, plural) The documents and records of the proceedings in a case.[19][18]

Word family

  • auto de fe

auto2 car

Confidence
Established
Formation
Clipping
First attested
1901 R. Blasco, La Correspondencia de España
Ultimate origin
French automobile

Pronunciation

  • /ˈauto/, [ˈau̯.t̪o][1]

Forms

auto m (plural autos)[1]

Etymology

The word for a car is a clipping from Spanish automóvil.[19][20][1][21] The DHLE compares the English word auto, recorded in English from 1899.[20] The longer word was taken from French automobile, recorded in French from 1852 in the sense “self-moving”.[22] The DLE analyses it as auto- and móvil.[23][1] Wiktionary traces the first part to Ancient Greek αὐτός (autós, “self”).[23][1]

Earliest recorded meaning

The DHLE's first record is from 1901, in an article by R. Blasco in La Correspondencia de España (Madrid) on the new models at the Paris motor show of that year, where it means a self-propelled vehicle, usually with four wheels, for carrying people.[20]

Semantic evolution

The word entered the dictionaries in 1917, in Alemany's supplement and in Malaret's dictionary of Puerto Rican words.[20] The auto de choque, the bumper car of a fairground, is recorded from 1942 in a newspaper of Palma de Mallorca.[20] The Academy included the word in its list of headwords in 1936 and gave it an entry of its own in 1970.[20] It is very frequent, above all in the Spanish of the Americas.[20] Vox labels it for the Southern Cone, Cuba and the Dominican Republic and calls it less frequent in Spain, where coche is the usual word;[24] carro is another Latin American synonym.[24]

Timeline

  • 1901 – first record, in La Correspondencia de España.[20]
  • 1917 – first in dictionaries, Alemany's supplement and Malaret's Puerto Rican dictionary.[20]
  • 1936 – included in the Academy's list of headwords.[20]
  • 1942 – first record of auto de choque.[20]
  • 1970 – the Academy's dictionary gives it its own entry.[20]

Meanings

Noun

  1. A car, an automobile: Dejamos el auto frente a la plaza.[19][1][24]

Word family

  • auto de choque
  • acto
  • actuar
  • Latin actus
  • Portuguese auto

Usage notes

An Old Spanish adjective auto, also spelt abto and acto, meant “suitable”; it comes from Latin aptum and occurs in Juan Ruiz's Libro de buen amor.[25]

References

  1. ^ a b c d e f g h i j k l m Wiktionary, the free dictionary, https://en.wiktionary.org
  2. ^ a b c Diccionario del Español Medieval electrónico (DEMel), data publication 2026 (CC BY-SA), Universität Rostock, p. s.v. auto
  3. ^ 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. abcto
  4. ^ a b c d e Corominas, Joan; Pascual, José A. (1980–1991), Diccionario crítico etimológico castellano e hispánico, 6 vols., Madrid: Gredos, p. 1, 43
  5. ^ a b Corominas, Joan (1973), Breve diccionario etimológico de la lengua castellana, 3rd ed., Madrid: Gredos, p. s.v. acto
  6. ^ 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. auto
  7. ^ Real Academia Española (1726–1739), Diccionario de la lengua castellana (Diccionario de Autoridades), 6 vols., Madrid: Francisco del Hierro, p. 1, 489
  8. ^ Meyer-Lübke, Wilhelm (1935), Romanisches etymologisches Wörterbuch, 3rd ed., Heidelberg: Winter, p. s.v. actus
  9. ^ Glare, P. G. W., ed. (2012), Oxford Latin Dictionary, 2nd ed., Oxford: Oxford University Press, p. s.v. actus
  10. ^ de Vaan, Michiel (2008), Etymological Dictionary of Latin and the other Italic Languages, Leiden Indo-European Etymological Dictionary Series 7, Leiden; Boston: Brill, p. s.v. agō
  11. ^ a b c d Alonso Pedraz, Martín (1986), Diccionario medieval español: desde las Glosas Emilianenses y Silenses (s. X) hasta el siglo XV, 2 vols., Salamanca: Universidad Pontificia de Salamanca, p. 450
  12. ^ a b c d Real Academia Española (2013–), Corpus del Diccionario histórico de la lengua española (CDH), version 3.1, https://apps.rae.es/CNDHE, p. s.v. auto
  13. ^ 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. 247
  14. ^ 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. 144
  15. ^ Terreros y Pando, Esteban de (1786–1793), Diccionario castellano con las voces de ciencias y artes y sus correspondientes de las tres lenguas francesa, latina e italiana, 4 vols., Madrid: Viuda de Ibarra, p. 1, 191
  16. ^ a b Real Academia Española (1770), Diccionario de la lengua castellana, 2nd ed., vol. I: A–B, Madrid: Joachín Ibarra, p. 1, 396
  17. ^ Real Academia Española (1899), Diccionario de la lengua castellana, 13th ed., Madrid: Imprenta de los Sres. Hernando y Compañía, p. 111
  18. ^ a b c Moliner, María (2007), Diccionario de uso del español, 3rd ed., Madrid: Gredos, p. s.v. auto
  19. ^ 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. auto
  20. ^ a b c d e f g h i j k l Real Academia Española (2013–), Diccionario histórico de la lengua española (DHLE), https://www.rae.es/dhle, p. s.v. auto
  21. ^ Gómez de Silva, Guido (1988), Breve diccionario etimológico de la lengua española, México: Fondo de Cultura Económica / El Colegio de México, p. 100
  22. ^ Real Academia Española (2013–), Diccionario histórico de la lengua española (DHLE), https://www.rae.es/dhle, p. s.v. automóvil
  23. ^ a b 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. automóvil
  24. ^ a b c Battaner Arias, Paz (dir.) (2017), Diccionario general de la lengua española VOX, Barcelona: Larousse Editorial, p. s.v. auto
  25. ^ Boggs, R. S.; Kasten, Lloyd; Keniston, Hayward; Richardson, H. B. (1946), Tentative Dictionary of Medieval Spanish, 2 vols., Chapel Hill, N.C., p. 61

Related etymologies

Cite this entry

“Auto.” Etymologically, 7 Nov. 2026, etymologically.com/es/auto. Accessed 7 Nov. 2026.

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