Etymologically

Etymology and origin of the Spanish word monstruo

Confidence
Established
Formation
Borrowing
First attested
c. 1250 Libro de Alexandre, as mostro More words from the 13th century
Borrowed from
Latin monstruum
Ultimate origin
Proto-Indo-European *mon-eie-

Pronunciation

  • /ˈmonstɾwo/, [ˈmõns.t̪ɾwo], /ˈmonstɾo/[1]

Forms

monstruo m (plural monstruos)[1] Older forms are mostro (Libro de Alexandre, and still in Cervantes, Lope and Vélez de Guevara), mostruo (Alonso de Palencia, 1490) and monstro (Lope, Covarrubias).[2] Oudin already preferred monstruo, and Autoridades made it the standard form.[2]

Etymology

It is borrowed from Late Latin monstruum, an alteration of Latin monstrum (“portent, prodigy; monster”).[2][3][4] Corominas explains the ⟨u⟩ by the influence of monstruōsus (“monstrous”), at a time when Latin wavered between forms such as mortuus (“dead”) and mortus.[2] The DLE and García de Diego also derive it from the Latin noun, with the ⟨u⟩ of monstruoso.[5][6] Wiktionary calls it a learned borrowing.[1]

The Latin noun was a word of religion: a prodigy that warned of the will of the gods, from moneō (“to warn, remind”).[3][7][8] Wiktionary derives it from Proto-Italic *monestrom, formed from the verb with the instrument suffix -trum.[1] De Vaan notes that the regular outcome would have lost the ⟨n⟩, which was brought back from the verb.[9] The verb goes back to *moneje- and Proto-Indo-European *mon-eie- (“to make think of, remind”), a causative related to the root of mente.[9][4] From it Latin formed mōnstrō (“to point out, show”), whence mostrar.[2][9]

Earliest recorded meaning

Corominas's first record is mostro in the Libro de Alexandre, of about 1250.[2][3] The DEMel lists the same text.[10] A translation of Jacques de Vitry's history of Jerusalem, of the mid-14th century, describes an animal quasi mostruo de espantable bramido “like a monster with a fearful roar”.[11] In Enrique de Villena's Eneida of 1427–1428 (in a copy of 1442), a maravilloso monstro is a portent: blood drips from a branch torn from the ground.[11]

Semantic evolution

In the 15th century the word was used for frightful creatures and visions, and for a person who lived against nature.[11] In 1548 a text from Santo Domingo speaks of monstruos humanos, people born with deformities.[12] Cervantes used both monstruos and mostruos, and the insult monstruo de naturaleza.[13] For Calderón the word could mean “hybrid”.[2]

Autoridades defined it as a birth or product against the regular order of nature, and by extension anything extremely large or out of the ordinary.[14] The Academy added a very ugly person or thing in 1817 and a very cruel, wicked person in 1884.[15][16] By 2001 it also had the colloquial sense of a person far above the common run in some activity, and the nonsense verses with which a composer shows a librettist where the stresses must fall.[17] Moliner records its use in apposition with the sense “splendid”.[18] In Chile el monstruo is the audience of the Viña del Mar song festival.[19] In the Dominican Republic monstruo, feminine monstrua, is a friendly form of address.[20]

Timeline

  • c. 1250 – mostro in the Libro de Alexandre.[2][3]
  • mid-14th century – mostruo for a strange animal.[11]
  • 1427–1428 – Villena's maravilloso monstro, a portent (in a copy of 1442).[11]
  • 1438 – the derivative monstruoso.[3]
  • 1490 – mostruo in Alonso de Palencia.[2]
  • 1548 – first record in the Americas, in Santo Domingo.[12]
  • 1607 – first record of the form monstruo.[3]
  • 1726–1739 – Autoridades fixes the form monstruo.[2][14]
  • 1884 – the Academy adds “a very cruel and wicked person”.[16]

Meanings

Noun

  1. A being with marked anomalies or departures from its species.[5]
  2. A fantastic creature that causes terror; a monster: En el cuento, un monstruo vivía bajo el puente.[5][1]
  3. Something exceedingly large or extraordinary of its kind.[5]
  4. A very ugly person or thing.[5]
  5. A very cruel and wicked person.[5][1]
  6. (colloquial) A person who far exceeds the common abilities in some activity: Ese chico es un monstruo del ajedrez.[5][17]
  7. (music) A set of nonsense lines that the composer writes to show the librettist where the stresses of the sung verses must go.[5]
  8. (Chile) The audience of the Viña del Mar song festival.[19]

Word family

  • monstruoso
  • monstruosidad

Usage notes

Monstruo sagrado is a colloquial name for a revered, untouchable figure, like vaca sagrada.[5] Wiktionary records the colloquial forms mounstro, monstro, mostro and moustro.[1]

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 h i j Corominas, Joan; Pascual, José A. (1980–1991), Diccionario crítico etimológico castellano e hispánico, 6 vols., Madrid: Gredos, p. 4, 164
  3. ^ a b c d e f Corominas, Joan (1973), Breve diccionario etimológico de la lengua castellana, 3rd ed., Madrid: Gredos, p. s.v. monstruo
  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. 471
  5. ^ a b c d e f g h i 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. monstruo
  6. ^ García de Diego, Vicente (1985), Diccionario etimológico español e hispánico, 2nd ed., Madrid: Espasa-Calpe (1st ed. 1954), p. s.v. monstrum
  7. ^ Bénaben, Michel (2000), Dictionnaire étymologique de l'espagnol, Paris: Ellipses, p. s.v. monstruo
  8. ^ Lewis, Charlton T.; Short, Charles (1879), A Latin Dictionary, Oxford: Clarendon Press
  9. ^ a b c de Vaan, Michiel (2008), Etymological Dictionary of Latin and the other Italic Languages, Leiden Indo-European Etymological Dictionary Series 7, Leiden; Boston: Brill
  10. ^ Diccionario del Español Medieval electrónico (DEMel), data publication 2026 (CC BY-SA), Universität Rostock, p. s.v. monstruo
  11. ^ a b c d e Real Academia Española (2013–), Corpus del Diccionario histórico de la lengua española (CDH), version 3.1, https://apps.rae.es/CNDHE, p. s.v. monstruo
  12. ^ 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. monstro
  13. ^ 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. 761
  14. ^ a b Real Academia Española (1726–1739), Diccionario de la lengua castellana (Diccionario de Autoridades), 6 vols., Madrid: Francisco del Hierro, p. 4, 598
  15. ^ Real Academia Española (1817), Diccionario de la lengua castellana, 5th ed., Madrid: Imprenta Real, p. 582
  16. ^ a b Real Academia Española (1884), Diccionario de la lengua castellana, 12th ed., Madrid: Imprenta de D. Gregorio Hernando (the first Academy edition with etymologies), p. 715
  17. ^ a b Real Academia Española (2001), Diccionario de la lengua española, 22nd ed., Madrid: Espasa-Calpe, p. s.v. monstruo
  18. ^ Moliner, María (2007), Diccionario de uso del español, 3rd ed., Madrid: Gredos, p. s.v. monstruo
  19. ^ 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. monstruo
  20. ^ 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. monstruo

Related etymologies

Cite this entry

“Monstruo.” Etymologically, 7 Nov. 2026, etymologically.com/es/monstruo. Accessed 7 Nov. 2026.

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