Etymologically

Etymology and origin of the Portuguese word sono

Confidence
Established
Formation
Inherited
First attested
1200s Cantigas de Santa Maria More words from the 13th century
Inherited from
Latin somnus
Ultimate origin
Proto-Indo-European *swépnos
Etymology tree
inherited borrowed derived
Latin somnus
Catalan son
French somme
Italian sonno
Portuguese sono
Romanian somn
Spanish sueño
From the same root
Italian sonnolento ← somnus
Latin īnsomnis ← somnus
Latin īnsomnium ← somnus
Latin sēmisomnus ← somnus
Latin somniculus ← somnus

Pronunciation

  • Brazil: /ˈsõ.nu/[1]
  • Portugal: /ˈso.nu/[1]

Forms

sono m (plural sonos)[1] Houaiss records sono, sonno and sõo in the 13th century, sopno and ssono in the 14th, and somno in the 15th.[2] The Crónica Geral also writes soño.[3]

Etymology

It is inherited from Latin somnus (“sleep”), written Old Galician-Portuguese sono in the oldest texts.[2][4][5][1] Portuguese keeps it apart from sonho “dream”, which comes from somnium (“dream”).[4] Spanish sueño stands for both Latin words, and French sommeil comes from the diminutive somniculus.[2][6]

The same Latin word is Galician sono, Italian sonno and Romanian somn.[1][7] The Latin noun goes back to Proto-Italic *swepnos and Proto-Indo-European *swépnos (“sleep”), from the root *swep-;[1][8] it is cognate with Ancient Greek ὕπνος (húpnos, “sleep”) and Sanskrit स्वप्न (svapna, “sleep, dream”).[1]

Earliest recorded meaning

In the Cantigas de Santa Maria a man falls into tal sono que sempre depois dormira “such a sleep that he would have slept for ever after”, and the monks of another miracle have tan gran sono that they do not wake.[3] A cantiga of Roi Fernandiz de Santiago in the Cancioneiro da Ajuda speaks of sleeping all one's sleep (dormir todo seu sono).[3]

Semantic evolution

The medieval word already meant both the state of sleep and the need for it.[3] The early dictionaries render it by Latin somnus,[9][10] and Bluteau explains sleep as a suspension of the senses caused by vapours rising from the stomach to the brain.[11] Figurative uses make it death (sono eterno, sono dos justos), stagnation, idleness and calm.[2][12]

The word passed into Macanese as sôno and into Ambonese Malay as sono.[1]

Timeline

  • 1200s – first records, in the Cantigas de Santa Maria.[2][4][3]
  • 1300s – the spelling sopno, with a ⟨p⟩ after the Latin.[2]
  • c. 1430 – sono in the Horto do Esposo (witness 1390–1437).[13]
  • 1569 – Cardoso renders sono by Latin somnus.[9]
  • 1712–1728 – Bluteau gives a long physiological account of sleep.[11]

Meanings

Noun

  1. sleep: the periodic state of rest in which consciousness and the senses are suspended.[2][14][1]
  2. sleepiness; the need or wish to sleep: Estou com sono.[2][14][1]
  3. A period of sleep; the state of one who sleeps: dormir a sono solto “to sleep soundly”.[2][14]
  4. (figurative) death.[2][12]
  5. (figurative) Stagnation; lack of activity or of will; indolence.[2]
  6. (figurative) Stillness, calm.[2]

Word family

  • soneca
  • soneira
  • ensonado

References

  1. ^ a b c d e f g h i j Wiktionary, the free dictionary, https://en.wiktionary.org
  2. ^ a b c d e f g h i j k l Houaiss, Antônio; Villar, Mauro de Salles (2001), Dicionário Houaiss da língua portuguesa, Rio de Janeiro: Objetiva, p. s.v. sono
  3. ^ a b c d e 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. sono
  4. ^ a b c Cunha, Antônio Geraldo da (2010), Dicionário etimológico da língua portuguesa, 4th ed., Rio de Janeiro: Lexikon, p. s.v. sono
  5. ^ Nascentes, Antenor (1966), Dicionário etimológico resumido, Rio de Janeiro: Instituto Nacional do Livro, p. s.v. sono
  6. ^ Corominas, Joan (1973), Breve diccionario etimológico de la lengua castellana, 3rd ed., Madrid: Gredos, p. s.v. sueño
  7. ^ Meyer-Lübke, Wilhelm (1935), Romanisches etymologisches Wörterbuch, 3rd ed., Heidelberg: Winter, p. 8066
  8. ^ 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. somnus
  9. ^ a b Cardoso, Jerónimo (1569–1570), Dictionarium ex lusitanico in latinum sermonem, Lisboa: João Álvares (CLP transcription, Universidade de Aveiro), p. s.v. sono
  10. ^ Barbosa, Agostinho (1611), Dictionarium lusitanicolatinum, Braga: Fructuoso Lourenço de Basto (CLP transcription, Universidade de Aveiro), p. s.v. sono
  11. ^ a b Bluteau, Raphael (1712–1728), Vocabulario portuguez e latino, 8 vols. + 2 supplement vols., Coimbra / Lisboa (CLP transcription, Universidade de Aveiro), p. s.v. sono
  12. ^ a b 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. sono
  13. ^ Centro de Linguística da Universidade de Lisboa, CTA – Corpus de Textos Antigos, https://teitok.clul.ul.pt/cta, p. s.v. sono
  14. ^ a b c Ferreira, Aurélio Buarque de Holanda, Novo dicionário Aurélio da língua portuguesa, digital edition, p. s.v. sono

Related etymologies

Cite this entry

“Sono.” Etymologically, 15 Nov. 2026, etymologically.com/pt/sono. Accessed 16 Nov. 2026.

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