Etymologically

Etymology and origin of the Portuguese word sereno

Confidence
Established
Formation
Borrowing
First attested
1400s the superlative serenyssymos More words from the 15th century
Borrowed from
Latin serenus
Ultimate origin
Latin serēnus
Etymology tree
inherited borrowed derived
Latin serēnus
Italian sereno
Romanian senin
Spanish sereno
English serene
Portuguese sereno
From the same root
Latin serēnitās ← serēnus
Latin serēnō ← serēnus
Latin serēscō ← serēnus
Romanian seninătate ← senin

Pronunciation

  • Brazil: /seˈɾẽ.nu/[1]
  • Portugal: /sɨˈɾe.nu/[1]

Forms

sereno (feminine serena, masculine plural serenos, feminine plural serenas)[1]

Etymology

It is borrowed from Latin serēnus (“clear, cloudless; calm”), a learned word.[2][1][3][4] The same Latin word is Spanish sereno, Italian sereno, Catalan serè and Romanian senin; French serein has been reshaped after the Latin.[1][5]

The noun “night damp” is the same word.[2][6] The DLP takes it from serēnum (“fair weather”), the neuter used as a noun.[6] Nascentes reports that some scholars linked it to sērum (“late hour”), as the vapours of the evening.[7] Corominas explains the Spanish noun from the phrase for leaving something out in the open at night, which one does only when no rain threatens.[8]

De Vaan reconstructs Proto-Italic *kseró- (“dry”) and traces it to Proto-Indo-European *Kseh₁-ró- (“dry”), comparing Ancient Greek ξηρός (xērós, “dry”).[9] The OLD and Wiktionary call the origin uncertain.[10][1]

Earliest recorded meaning

Houaiss dates the adjective to the 15th century from the superlative serenyssymos, in the sense “meek”.[2] Cunha notes that the superlative sereníssimo, a title given to kings and great persons, occurs in the 15th century, and dates the plain adjective to 1572.[4] The Vita Christi is dedicated ao Serenissimo principe e rei potentissimo “to the most serene prince and most powerful king”.[11]

Semantic evolution

The noun appears in the 16th century.[4] Cardoso (1569) glosses sereno with Latin sub dio “in the open air”.[12] Houaiss dates the sense “night dew, evening damp” to 1612.[2] Morais (1789) defines o sereno da noite as the damp, misty night air, and estar ao sereno as being out in the open.[13] Folqman (1755) gives the adjective for the air and the weather.[14]

Brazilian Portuguese gave the noun the senses “drizzle”, “the open air at night” and “night life”.[2] In the north-east it is also the crowd that gathers in front of a house where a party is held, and in Rio de Janeiro a night bus.[2][15][1] In Rio Grande do Sul it means the dew on the grass.[16] The noun passed into Nheengatu as serenu.[1]

Timeline

  • 15th century – the superlative serenyssymos.[2][4]
  • 1569 – Cardoso glosses sereno “in the open air”.[12]
  • 1572 – Cunha's date for the adjective.[4]
  • 1612 – Houaiss's date for the noun “night dew”.[2]
  • 1755 – Folqman records tempo sereno.[14]
  • 1789 – Morais defines o sereno da noite and estar ao sereno.[13]

Meanings

Adjective

  1. calm, quiet, without sudden movement: um rio sereno.[2][1]
  2. Showing peace of mind; serene.[2][17]
  3. Of the sky or weather: clear, cloudless, fair.[2][1]
  4. Free from trouble or worry.[2][6]
  5. Level-headed, balanced, impartial.[2][18]
  6. Soft and pleasant to the ear.[2]

Noun

  1. The light dew or damp that falls at dusk or at night.[2][1][19]
  2. (Brazil) A fine, brief rain; drizzle.[2][1]
  3. (Brazil, informal) The open air at dusk or at night; night life.[2][6]
  4. (north-eastern Brazil) A crowd in front of a house where a party is held.[2][15]
  5. (Rio de Janeiro) A night bus.[2][1]

Word family

  • serenamente

Usage notes

In Brazil ficar no sereno means to stay up all night celebrating, or, in Minas Gerais, to watch a party from outside.[2]

Houaiss and Aurélio record a separate noun sereno “night watchman”, taken from Spanish sereno, the noun from the adjective: the watchman who walked the streets of Spain calling the hours and the weather.[2][17] In Lisbon it was a coachman who worked at night, and in Rio Grande do Sul it means a watchman.[2][17][6] In the Minho sereno is also a name of the serin, a bird, of obscure origin.[6][19]

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 d e f g h i j k l m n o p q r s t u v Houaiss, Antônio; Villar, Mauro de Salles (2001), Dicionário Houaiss da língua portuguesa, Rio de Janeiro: Objetiva, p. s.v. sereno
  3. ^ Nascentes, Antenor (1966), Dicionário etimológico resumido, Rio de Janeiro: Instituto Nacional do Livro, p. s.v. sereno
  4. ^ a b c d e Cunha, Antônio Geraldo da (2010), Dicionário etimológico da língua portuguesa, 4th ed., Rio de Janeiro: Lexikon, p. s.v. serenar
  5. ^ Rey, Alain, ed. (1992), Dictionnaire historique de la langue française, Paris: Le Robert, p. s.v. serein
  6. ^ a b c d e f 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. sereno
  7. ^ Nascentes, Antenor (1955), Dicionário etimológico da língua portuguesa, vol. 1: Nomes comuns, Rio de Janeiro (1st ed. 1932, preface by W. Meyer-Lübke), p. 465
  8. ^ Corominas, Joan (1973), Breve diccionario etimológico de la lengua castellana, 3rd ed., Madrid: Gredos, p. s.v. sereno
  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. ^ Glare, P. G. W., ed. (2012), Oxford Latin Dictionary, 2nd ed., Oxford: Oxford University Press
  11. ^ 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. sereno
  12. ^ a b Cardoso, Jerónimo (1569–1570), Dictionarium ex lusitanico in latinum sermonem, Lisboa: João Álvares (CLP transcription, Universidade de Aveiro), p. s.v. sereno
  13. ^ a b Silva, António de Morais (1789), Diccionario da lingua portugueza composto pelo padre D. Rafael Bluteau, reformado, e accrescentado, 2 vols., Lisboa: Simão Thaddeo Ferreira, p. 2, 394
  14. ^ a b Folqman, Carlos (1755), Diccionario portuguez, e latino, Lisboa: Régia Officina Silviana (CLP transcription, Universidade de Aveiro), p. s.v. sereno
  15. ^ a b Navarro, Fred (2004), Dicionário do Nordeste, São Paulo: Estação Liberdade, p. s.v. sereno
  16. ^ Schlee, Aldyr Garcia (2019), Dicionário da Cultura Pampeana Sul-Rio-Grandense, 2 vols., Pelotas: Fructos do Paiz, p. 2
  17. ^ a b c Ferreira, Aurélio Buarque de Holanda, Novo dicionário Aurélio da língua portuguesa, digital edition, p. s.v. sereno
  18. ^ Michaelis: Moderno Dicionário da Língua Portuguesa, São Paulo: Melhoramentos (online as Michaelis Dicionário Brasileiro da Língua Portuguesa, https://michaelis.uol.com.br), p. s.v. sereno
  19. ^ a b Dicionário Priberam da Língua Portuguesa, Lisboa: Priberam Informática, https://dicionario.priberam.org, p. s.v. sereno

Related etymologies

Cite this entry

“Sereno.” Etymologically, 15 Nov. 2026, etymologically.com/pt/sereno. Accessed 16 Nov. 2026.

Last edited on . ·