Etymologically

Etymology and origin of the Spanish word insomnio

Confidence
Established
Formation
Borrowing
First attested
1506 Diego Álvarez Chanca, treatise on epidemic pleurisy More words from the 16th century
Borrowed from
Latin insomnium
Ultimate origin
Latin somnus
Etymology tree
inherited borrowed derived
Latin somnus
French somme
Italian sonno
Spanish sueño
Latin īnsomnium
Spanish insomnio
From the same root
Latin īnsomnis ← somnus
Latin sēmisomnus ← somnus
Latin somniculus ← somnus

Pronunciation

  • /inˈsomnjo/, [ĩnˈsõm.njo][1]

Forms

insomnio m (plural insomnios)[1]

Etymology

It is borrowed from Latin insomnium, a learned word.[2][1][3][4] Corominas lists it, beside insomne, among the learned words of the family of sueño.[4] Wiktionary calls its source Vulgar Latin, and the Academy's dictionaries of 1884 and 1899 and the DTME give the plural form insomnia.[1][5][6][7]

In Latin the word had two meanings.[8] As “wakefulness, sleeplessness” it is formed with the negative in- from somnus (“sleep”); as “dream” it was read as the prefix meaning “in” plus somnium (“dream”), on the model of Ancient Greek ἐνύπνιον (enúpnion).[8][4] Gómez de Silva derives it from insomnis (“sleepless”).[9] The Latin word for sleep goes back to Proto-Indo-European *swépnos, and is related to ὕπνος (húpnos).[10][1]

The doublet is ensueño “dream”, first recorded in 1580.[1][11] The REW lists it among the inherited outcomes of the Latin word, but Corominas thinks it is a humanist creation of the 16th century modelled on the Latin, as it is recorded too late to be inherited.[12][4]

Earliest recorded meaning

The CDH's first record is in Diego Álvarez Chanca's treatise on epidemic pleurisy (1506): if the matter goes to the brain and the patient has insomnio y dolor de cabeza “sleeplessness and headache”.[13]

Semantic evolution

In the 16th and 17th centuries the word could also mean “dream, vision”, the second Latin sense: in 1578 Cristóbal de Acosta says datura brings deep sleep with varias representaciones de insomnios, and García de Silva y Figueroa writes of terribles insomnios that frightened a sleeper.[13] The Academy's dictionary of 1817 defined it only as wakefulness, sleeplessness.[14] Domínguez in 1846 added the medical view of it as a disorder in its own right or a symptom of another illness.[15] The first record from the Americas is from Lima in 1775.[16]

Timeline

  • 1506 – Álvarez Chanca's treatise, the CDH's first record.[13]
  • 1578 – Cristóbal de Acosta uses insomnios for dream images.[13]
  • 1580 – the doublet ensueño is first recorded.[11]
  • 1775 – the first record from the Americas, in Lima.[16]
  • 1817 – the Academy's dictionary defines it as vigilia, desvelo.[14]
  • 1884 – the Academy gives the etymology insomnia.[5]

Meanings

Noun

  1. insomnia, sleeplessness: lack of sleep at the time for sleeping: Desde la mudanza sufre de insomnio.[2][17][1]
  2. (medicine) A sleep disorder with difficulty falling or staying asleep, early waking or broken sleep.[7]

References

  1. ^ a b c d e f g Wiktionary, the free dictionary, https://en.wiktionary.org
  2. ^ 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. insomnio
  3. ^ García de Diego, Vicente (1985), Diccionario etimológico español e hispánico, 2nd ed., Madrid: Espasa-Calpe (1st ed. 1954), p. 3492
  4. ^ a b c d Corominas, Joan; Pascual, José A. (1980–1991), Diccionario crítico etimológico castellano e hispánico, 6 vols., Madrid: Gredos, p. 5, 327
  5. ^ 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. 601
  6. ^ Real Academia Española (1899), Diccionario de la lengua castellana, 13th ed., Madrid: Imprenta de los Sres. Hernando y Compañía, p. 561
  7. ^ a b Real Academia Nacional de Medicina (2011), Diccionario de términos médicos, Madrid: Editorial Médica Panamericana; online at https://dtme.ranm.es
  8. ^ a b Glare, P. G. W., ed. (2012), Oxford Latin Dictionary, 2nd ed., Oxford: Oxford University Press
  9. ^ Gómez de Silva, Guido (1988), Breve diccionario etimológico de la lengua española, México: Fondo de Cultura Económica / El Colegio de México
  10. ^ de Vaan, Michiel (2008), Etymological Dictionary of Latin and the other Italic Languages, Leiden Indo-European Etymological Dictionary Series 7, Leiden; Boston: Brill
  11. ^ a b Corominas, Joan (1973), Breve diccionario etimológico de la lengua castellana, 3rd ed., Madrid: Gredos, p. s.v. sueño
  12. ^ Meyer-Lübke, Wilhelm (1935), Romanisches etymologisches Wörterbuch, 3rd ed., Heidelberg: Winter, p. 4474
  13. ^ 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
  14. ^ a b Real Academia Española (1817), Diccionario de la lengua castellana, 5th ed., Madrid: Imprenta Real, p. 497
  15. ^ Domínguez, Ramón Joaquín (1846–1847), Diccionario nacional o gran diccionario clásico de la lengua española, 2 vols., Madrid: Establecimiento Léxico-Tipográfico de R. J. Domínguez, p. 1004
  16. ^ 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. insomnio
  17. ^ Moliner, María (2007), Diccionario de uso del español, 3rd ed., Madrid: Gredos, p. s.v. insomnio

Related etymologies

Cite this entry

“Insomnio.” Etymologically, 7 Nov. 2026, etymologically.com/es/insomnio. Accessed 7 Nov. 2026.

Last edited on . ·