Etymologically

Etymology and origin of the Portuguese word caso

Confidence
Established
Formation
Borrowing
First attested
1200s Cunha's index of medieval Portuguese More words from the 13th century
Borrowed from
Latin casus
Ultimate origin
Latin cadō
Etymology tree
inherited borrowed derived
Latin cadō
French choir
Latin cāsus
French cas
Italian caso
Portuguese caso
Romanian caz
Spanish caso
From the same root
Latin accidō ← cadō
Latin cadāver ← cadō
Latin cadūcus ← cadō
Latin concidō ← cadō
Latin dēcidō ← cadō
Latin excidō ← cadō
Latin incidō ← cadō
Latin intercidō ← cadō
Latin occidō ← cadō
Latin prōcidō ← cadō
Latin recidō ← cadō
Latin stīllicidium ← cadō
Latin succidō ← cadō
Latin cāsuālis ← cāsus

Pronunciation

  • Brazil: /ˈka.zu/[1]
  • Portugal: /ˈka.zu/[1]

Forms

caso m (plural casos)[1]

Etymology

It is borrowed from Latin cāsus (“a fall; an event, chance”), a learned word according to Wiktionary.[1] Houaiss, Cunha and Nascentes simply derive it from the Latin noun.[2][3][4] Houaiss records the 15th-century spellings Old Galician-Portuguese causo (1443), Old Galician-Portuguese caubsso (1450), Old Galician-Portuguese casso and Old Galician-Portuguese quasso.[2]

The same Latin word is Galician caso, Spanish caso, Catalan cas, French cas and Italian caso.[1] Corominas also treats the Spanish word as taken from Latin, first recorded early in the 15th century.[5] The French word was first written quas about 1220.[6]

The Latin noun is formed from cadō (“to fall, happen”) with the suffix of action nouns -tus, and was once written cassus.[7][1] Wiktionary traces the verb to Proto-Indo-European *ḱh₂d- (“to fall”), and notes that the grammatical sense of the Latin word copies Ancient Greek πτῶσις (ptôsis).[1]

Earliest recorded meaning

Houaiss dates the word to the 13th century from Cunha's index of medieval Portuguese, and the Universo Cantigas glossary records it in a cantiga in the sense “lawsuit”.[2][8] Lorenzo's chronology has it in documents of 1431, ou ouuer tal caso ou negocio por que non posa usar do dito oficio “or should he have such a case or business that he cannot exercise the said office”, and 1433, nos casos honde couber morte “in the cases that carry the death penalty”.[9] A Galician lease of 1435 from Noia covers the tenant against fire, water, war et de todo outro caso fortetuýto “and every other chance event”.[9]

Semantic evolution

The medieval documents use the word for a case at law, a matter in hand and a chance event.[9] Barbosa in 1611 has não fazer caso “to disregard”, and Pereira in 1697 gives the sense “esteem”, still alive in fazer caso de.[10][11][12] The adverb a caso “by chance” is in Morais, and Figueiredo in 1899 adds the case of a disease.[13][14]

The conditional use grew in phrases: a Noia document of 1499 has caso que “supposing that”, Bluteau and Folqman em caso que and dado caso que; today caso alone introduces a condition with the subjunctive.[9][15][16][17] In Brazil the word also means a tale or anecdote, and a love affair, especially a secret one, or the lover in it.[2][18] In Rio Grande do Sul the variant causo is a story told by the fire in the ranch sheds.[19]

Timeline

  • 13th century – first record, in Cunha's index of medieval Portuguese.[2]
  • 1430 – the Horto do Esposo (copied 1390–1437) uses the word.[20]
  • 1431 – tal caso ou negocio in a document.[9]
  • 1435 – todo outro caso fortetuýto in a lease from Noia.[9]
  • 1443 – the spelling causo.[2]
  • 1499 – caso que “supposing that” in a document from Noia.[9]
  • 1569 – Cardoso's dictionary glosses it with Latin casus.[21]
  • 1611 – Barbosa lists não fazer caso “to disregard”.[10]
  • 1697 – Pereira gives the sense “esteem”.[11]
  • 1899 – Figueiredo records the case of a disease, and descaso “disregard” is first recorded.[14][3]

Meanings

Noun

  1. Something that happens or may happen; an event, occurrence.[2][22]
  2. (law) A lawsuit, cause.[2]
  3. An act or deed: um caso de corrupção.[2]
  4. A circumstance or situation: nesse caso, não vou.[2][23]
  5. An affair that causes a stir around a person or event.[2]
  6. A story, tale or anecdote.[2][18][1]
  7. A quarrel or disagreement; a row.[2][22]
  8. An instance of a disease: dois casos de sarampo.[2][24]
  9. (Brazil) A love affair, especially a secret one; the lover in such an affair.[2][1]
  10. Regard, esteem: fazer caso de.[24][12]
  11. (grammar) case, the form or category that shows a noun's function in the sentence.[2][1]

Conjunction

  1. if, in case; used with the subjunctive: caso chova, ficamos.[2][17][1]

Word family

  • acaso
  • descaso

Usage notes

The Brazilian causo, a story told aloud, is the same word in a popular form.[19] Common phrases are caso contrário “otherwise” and the legal caso fortuito “act of God” and caso omisso “a case the law does not provide for”.[2]

References

  1. ^ a b c d e f g h i j k 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 Houaiss, Antônio; Villar, Mauro de Salles (2001), Dicionário Houaiss da língua portuguesa, Rio de Janeiro: Objetiva, p. s.v. caso
  3. ^ a b Cunha, Antônio Geraldo da (2010), Dicionário etimológico da língua portuguesa, 4th ed., Rio de Janeiro: Lexikon, p. s.v. caso
  4. ^ Nascentes, Antenor (1955), Dicionário etimológico da língua portuguesa, vol. 1: Nomes comuns, Rio de Janeiro (1st ed. 1932, preface by W. Meyer-Lübke), p. 102
  5. ^ Corominas, Joan; Pascual, José A. (1980–1991), Diccionario crítico etimológico castellano e hispánico, 6 vols., Madrid: Gredos, p. 1, 909
  6. ^ Rey, Alain, ed. (1992), Dictionnaire historique de la langue française, Paris: Le Robert, p. s.v. cas
  7. ^ Glare, P. G. W., ed. (2012), Oxford Latin Dictionary, 2nd ed., Oxford: Oxford University Press, p. s.v. cāsus
  8. ^ Universo Cantigas: Glosario da poesía medieval profana galego-portuguesa, A Coruña: Instituto da Lingua e Literatura (ILLA), Universidade da Coruña, https://www.universocantigas.gal, p. s.v. caso
  9. ^ a b c d e f g 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. caso
  10. ^ a b Barbosa, Agostinho (1611), Dictionarium lusitanicolatinum, Braga: Fructuoso Lourenço de Basto (CLP transcription, Universidade de Aveiro), p. s.v. caso
  11. ^ a b Pereira, Bento (1697), Thesouro da lingoa portuguesa, in the 1697 edition of his Prosodia (1st ed. 1647; CLP transcription, Universidade de Aveiro), p. s.v. caso
  12. ^ a b 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. caso
  13. ^ 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. 1, 242
  14. ^ a b Figueiredo, Cândido de (1899), Novo diccionário da língua portuguesa, 1st ed., 2 vols., Lisboa: Tavares Cardoso & Irmão, p. 261
  15. ^ Bluteau, Raphael (1712–1728), Vocabulario portuguez e latino, 8 vols. + 2 supplement vols., Coimbra / Lisboa (CLP transcription, Universidade de Aveiro), p. s.v. caso
  16. ^ Folqman, Carlos (1755), Diccionario portuguez, e latino, Lisboa: Régia Officina Silviana (CLP transcription, Universidade de Aveiro), p. s.v. caso
  17. ^ 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. caso
  18. ^ a b Aulete, Francisco Júlio Caldas, Dicionário contemporâneo da língua portuguesa (1st ed. 1881), online as Aulete Digital, Rio de Janeiro: Lexikon, https://aulete.com.br, p. s.v. caso
  19. ^ a b Schlee, Aldyr Garcia (2019), Dicionário da Cultura Pampeana Sul-Rio-Grandense, 2 vols., Pelotas: Fructos do Paiz, p. s.v. caso
  20. ^ Centro de Linguística da Universidade de Lisboa, CTA – Corpus de Textos Antigos, https://teitok.clul.ul.pt/cta, p. s.v. caso
  21. ^ Cardoso, Jerónimo (1569–1570), Dictionarium ex lusitanico in latinum sermonem, Lisboa: João Álvares (CLP transcription, Universidade de Aveiro), p. s.v. caso
  22. ^ a b Ferreira, Aurélio Buarque de Holanda, Novo dicionário Aurélio da língua portuguesa, digital edition, p. s.v. caso
  23. ^ Porto Editora (2013), Grande Dicionário da Língua Portuguesa, Porto: Porto Editora, p. 1866
  24. ^ a b Dicionário Priberam da Língua Portuguesa, Lisboa: Priberam Informática, https://dicionario.priberam.org, p. s.v. caso

Related etymologies

Cite this entry

“Caso.” Etymologically, 15 Nov. 2026, etymologically.com/pt/caso. Accessed 16 Nov. 2026.

Last edited on . ·