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
From the same root
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
- Careful, zealous (zeloso).[2][14]
- curious, eager to see, hear or learn: Era um aluno curioso e fazia muitas perguntas.[2][1]
- (pejorative) Prying, nosy.[2][15]
- Moved by curiosity: espreitava a rua com ar curioso.[2][14]
- Interesting, odd, surprising.[2][1]
Noun
- A curious person; an onlooker.[2][1]
- (Brazil, informal) An amateur, someone who practises a trade without training.[2][15]
- (Brazil, informal) A folk healer.[2]
Word family
- curiosamente
Related words
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
- ^ a b c d e f g h i j Wiktionary, the free dictionary, https://en.wiktionary.org
- ^ 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
- ^ Nascentes, Antenor (1966), Dicionário etimológico resumido, Rio de Janeiro: Instituto Nacional do Livro, p. s.v. curioso
- ^ 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
- ^ a b c Glare, P. G. W., ed. (2012), Oxford Latin Dictionary, 2nd ed., Oxford: Oxford University Press, p. s.v. cūriōsus
- ^ de Vaan, Michiel (2008), Etymological Dictionary of Latin and the other Italic Languages, Leiden Indo-European Etymological Dictionary Series 7, Leiden; Boston: Brill
- ^ 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
- ^ 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
- ^ Navarro, Fred (2004), Dicionário do Nordeste, São Paulo: Estação Liberdade, p. s.v. curioso
- ^ Silva Bastos, José Timóteo da (1912), Diccionario etymologico, prosodico e orthographico da lingua portugueza, Lisboa: Parceria António Maria Pereira, p. s.v. curioso
- ^ 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
- ^ Centro de Linguística da Universidade de Lisboa, CTA – Corpus de Textos Antigos, https://teitok.clul.ul.pt/cta, p. s.v. curioso
- ^ 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
- ^ a b Ferreira, Aurélio Buarque de Holanda, Novo dicionário Aurélio da língua portuguesa, digital edition, p. s.v. curioso
- ^ 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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