Etymologically

Etymology and origin of the Portuguese word curioso

Confidence
Established
Formation
Borrowing
First attested
1300s spelt corioso More words from the 14th century
Borrowed from
Latin curiosus
Ultimate origin
Latin cūra
Etymology tree
inherited borrowed derived
Latin cūra
French cure
Italian cura
Portuguese cura
Spanish cura
Latin cūriōsus
French curieux
Romanian curios
Italian curioso
Portuguese curioso
Spanish curioso
From the same root
Latin cūrātīvus ← cūra
Latin cūrō ← cūra
Latin incūria ← cūra
Latin sēcūrus ← cūra
Latin cūriōsē ← cūriōsus
Latin cūriōsitās ← cūriōsus
Latin incūriōsus ← cūriōsus
Romanian curiozitate ← cūriōsus

Pronunciation

  • Brazil: /ku.ɾiˈo.zu/, /kuˈɾjo.zu/[1]
  • Portugal: /kuˈɾjo.zu/[1]

Forms

curioso (feminine curiosa, masculine plural curiosos, feminine plural curiosas, diminutive curiosinho, metaphonic)[1] Old spellings are corioso (14th century) and coriosso (15th century), beside curioso from the 15th century.[2]

Etymology

It is borrowed from Latin cūriōsus (“careful, diligent; inquisitive”), first recorded in the 14th century as Old Galician-Portuguese corioso.[2] Nascentes calls it learned, while Wiktionary treats it as inherited.[3][1]

The same Latin word is Spanish curioso, Catalan curiós, Italian curioso and Romanian curios.[1][4]

The OLD forms the Latin adjective cūra (“care”) with the suffix -ōsus.[5][1] Wiktionary takes it as a back-formation from incūriōsus (“careless”).[5][1] De Vaan traces the noun to Proto-Italic *kwois-ā- (“care, watch”), from the root Proto-Indo-European *kwei-s- (“to heed”).[6]

Semantic evolution

The Latin adjective meant first “careful, painstaking” and then “eager to know”.[5] Houaiss gives the sense “zealous, careful” first, and Morais (1789) still has it beside “endowed with curiosity”.[2][7] Bluteau (1712–1728) defines the curious man as one fond of knowing things that are no concern of his.[8]

Morais also records the noun for someone who practises an art without having learned it from a master, the amateur of today.[7] In Brazil the curioso is also a folk healer, and in the north-east an unlettered man who knows a little of everything.[2][9] The sense “odd, interesting”, said of things, is in Silva Bastos (1912).[10] Caldas Aulete records the regional Portuguese sense “skilful, clever”.[11]

Timeline

  • 14th century – first record, spelt corioso.[2]
  • 15th century – the spellings curioso and coriosso.[2]
  • c. 1510 – the Vida de Santo Agostinho (copied 1480–1510) uses curioso.[12]
  • 1561 – curiosos in a private letter.[13]
  • 1712 – Bluteau defines it as fond of knowing what does not concern one.[8]
  • 1789 – Morais records the noun for an amateur.[7]

Meanings

Adjective

  1. Careful, zealous (zeloso).[2][14]
  2. curious, eager to see, hear or learn: Era um aluno curioso e fazia muitas perguntas.[2][1]
  3. (pejorative) Prying, nosy.[2][15]
  4. Moved by curiosity: espreitava a rua com ar curioso.[2][14]
  5. Interesting, odd, surprising.[2][1]

Noun

  1. A curious person; an onlooker.[2][1]
  2. (Brazil, informal) An amateur, someone who practises a trade without training.[2][15]
  3. (Brazil, informal) A folk healer.[2]

Word family

  • curiosamente

Usage notes

Bluteau reports the derivation of the master Venegas, who took curiosus from the Latin adverb cur “why?”, because the curious are great askers of questions.[8] The plural is pronounced with open /ɔ/, curiosos.[15]

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 m n Houaiss, Antônio; Villar, Mauro de Salles (2001), Dicionário Houaiss da língua portuguesa, Rio de Janeiro: Objetiva, p. s.v. curioso
  3. ^ Nascentes, Antenor (1966), Dicionário etimológico resumido, Rio de Janeiro: Instituto Nacional do Livro, p. s.v. curioso
  4. ^ 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. curioso
  5. ^ a b c Glare, P. G. W., ed. (2012), Oxford Latin Dictionary, 2nd ed., Oxford: Oxford University Press, p. s.v. cūriōsus
  6. ^ de Vaan, Michiel (2008), Etymological Dictionary of Latin and the other Italic Languages, Leiden Indo-European Etymological Dictionary Series 7, Leiden; Boston: Brill
  7. ^ a b c 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, 356
  8. ^ a b c Bluteau, Raphael (1712–1728), Vocabulario portuguez e latino, 8 vols. + 2 supplement vols., Coimbra / Lisboa (CLP transcription, Universidade de Aveiro), p. s.v. curioso
  9. ^ Navarro, Fred (2004), Dicionário do Nordeste, São Paulo: Estação Liberdade, p. s.v. curioso
  10. ^ Silva Bastos, José Timóteo da (1912), Diccionario etymologico, prosodico e orthographico da lingua portugueza, Lisboa: Parceria António Maria Pereira, p. s.v. curioso
  11. ^ 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. curioso
  12. ^ Centro de Linguística da Universidade de Lisboa, CTA – Corpus de Textos Antigos, https://teitok.clul.ul.pt/cta, p. s.v. curioso
  13. ^ CLUL (ed.) (2014), P.S. Post Scriptum: Arquivo Digital de Escrita Quotidiana em Portugal e Espanha na Época Moderna, Lisboa: Centro de Linguística da Universidade de Lisboa, http://ps.clul.ul.pt, p. s.v. curioso
  14. ^ a b Ferreira, Aurélio Buarque de Holanda, Novo dicionário Aurélio da língua portuguesa, digital edition, p. s.v. curioso
  15. ^ a b c Dicionário Priberam da Língua Portuguesa, Lisboa: Priberam Informática, https://dicionario.priberam.org, p. s.v. curioso

Related etymologies

Cite this entry

“Curioso.” Etymologically, 15 Nov. 2026, etymologically.com/pt/curioso. Accessed 16 Nov. 2026.

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