Etymology and origin of the Portuguese word opinião
- Confidence
- Established
- Formation
- Borrowing
- First attested
- 1300s the plural openyões More words from the 14th century
- Borrowed from
- Latin opinio
- Ultimate origin
- Latin opinor
Etymology tree
Forms
opinião f (plural opiniões)[1] Medieval texts write openiã, openiam and the plurals openyões and opiniões in the 14th century, and oppenyom, opinioões and oupenjãos in the 15th.[2][3] A private letter of 1541 spells it opiniam.[4]
Etymology
It is borrowed from Latin opīniō (“opinion, belief, supposition”), written Old Galician-Portuguese opynion in the oldest texts.[1][2][3] Nascentes calls it semi-learned.[5]
The Latin noun is formed from opīnor (“to suppose, conjecture, deem”) with the suffix -iō.[1][6] The origin of the verb is unclear: de Vaan reports Steinbauer's proposal of a compound meaning “to try to achieve”, notes Schrijver's view that the traditional link with optō (“to choose”) is weak in meaning, and leaves it without a PIE etymology.[7]
The same Latin word gave Galician opinión, Spanish opinión, Catalan opinió, French opinion, Italian opinione and Romanian opinie.[1] The Spanish word is a learned borrowing recorded from about 1250.[8][9] The Portuguese verb opinar is a separate, later borrowing of the Latin verb, recorded only from 1688.[10][3]
Earliest recorded meaning
Houaiss and Cunha date the noun to the 14th century, from Cunha's medieval index.[2][3] Cunha's record is the plural openyões.[2][3] The sources quote no context for these records.[2] Houaiss keeps an obsolete sense “undertaking, purpose”.[2]
Semantic evolution
Barbosa's dictionary of 1611 already separates two senses, “fame, esteem” and “judgement, view”, each with Latin examples from Cicero.[11] Morais (1813) adds the vote one gives and good or bad reputation, as in homem de opinião “a man of good name”.[12] Vieira defines it as the view of someone who speaks on a question under deliberation.[13]
Modern Portuguese uses it for any personal view, a political or religious position, an unproven assumption and the shared view of a community, as in opinião pública “public opinion”.[2][14] Philosophy uses it for unexamined common belief as opposed to knowledge.[2] Informally it can mean stubbornness or vanity, and regional surveys record “stubbornness” in Brazil, “presumption” in Portugal and “goodwill” in the Azores.[2][15]
Timeline
- 14th century – first records, including the plural openyões.[2][3]
- 15th century – spellings oppenyom and opinioões.[2]
- 1541 – opiniam in a private letter.[4]
- 1611 – Barbosa gives the senses “fame, esteem” and “judgement”.[11]
- 1688 – first record of the verb opinar.[10]
- 1697 – Pereira glosses it with Latin opinio and opinatio.[16]
- 1813 – Morais records homem de opinião.[12]
Meanings
Noun
- A way of thinking or judging; the view one holds on a question; opinion: Ela mudou de opinião depois da reunião.[2][17][1]
- A judgement given after reflection or deliberation; a vote.[2][18]
- A position held in a particular field, such as politics or religion; a doctrine.[2][17]
- An idea that has not been checked; an unfounded presumption.[2][14]
- The esteem in which someone or something is held; reputation.[2][18]
- The shared view of a group or community on a subject;[2][19] opinião pública “public opinion”.[2][19]
- (philosophy) Common belief accepted without examination, as opposed to knowledge.[2]
- (informal) stubbornness, obstinacy; also an excessive good opinion of oneself, vanity.[2][15]
Word family
- opinioso
Related words
References
- ^ a b c d e f g Wiktionary, the free dictionary, https://en.wiktionary.org
- ^ a b c d e f g h i j k l m n o p q r s t Houaiss, Antônio; Villar, Mauro de Salles (2001), Dicionário Houaiss da língua portuguesa, Rio de Janeiro: Objetiva, p. s.v. opinião
- ^ a b c d e f Cunha, Antônio Geraldo da (2010), Dicionário etimológico da língua portuguesa, 4th ed., Rio de Janeiro: Lexikon, p. s.v. opinar
- ^ a b 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. opinião
- ^ Nascentes, Antenor (1966), Dicionário etimológico resumido, Rio de Janeiro: Instituto Nacional do Livro, p. s.v. opinião
- ^ Glare, P. G. W., ed. (2012), Oxford Latin Dictionary, 2nd ed., Oxford: Oxford University Press, p. s.v. opīniō
- ^ 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. opīnor
- ^ Corominas, Joan; Pascual, José A. (1980–1991), Diccionario crítico etimológico castellano e hispánico, 6 vols., Madrid: Gredos, p. 4, 287
- ^ Corominas, Joan (1973), Breve diccionario etimológico de la lengua castellana, 3rd ed., Madrid: Gredos, p. s.v. opinión
- ^ a b Houaiss, Antônio; Villar, Mauro de Salles (2001), Dicionário Houaiss da língua portuguesa, Rio de Janeiro: Objetiva, p. s.v. opinar
- ^ a b Barbosa, Agostinho (1611), Dictionarium lusitanicolatinum, Braga: Fructuoso Lourenço de Basto (CLP transcription, Universidade de Aveiro), p. s.v. opinião
- ^ a b Silva, António de Morais (1813), Diccionario da lingua portugueza, 2nd ed., 2 vols., Lisboa: Typographia Lacerdina, p. 2, 367
- ^ Vieira, Frei Domingos (1871–1874), Grande Diccionario Portuguez ou Thesouro da lingua portugueza, 5 vols., Porto: Ernesto Chardron e Bartholomeu H. de Moraes, p. 4, 558
- ^ 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. opinião
- ^ a b Instituto da Lingua Galega, Tesouro do léxico patrimonial galego e portugués (TLPGP), Santiago de Compostela: Universidade de Santiago de Compostela, https://ilg.usc.gal/tesouro, p. s.v. opinião
- ^ 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. opinião
- ^ a b Ferreira, Aurélio Buarque de Holanda, Novo dicionário Aurélio da língua portuguesa, digital edition, p. s.v. opinião
- ^ 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. opinião
- ^ a b Dicionário Priberam da Língua Portuguesa, Lisboa: Priberam Informática, https://dicionario.priberam.org, p. s.v. opinião
Related etymologies
Cite this entry
“Opinião.” Etymologically, 15 Nov. 2026, etymologically.com/pt/opini%C3%A3o. Accessed 16 Nov. 2026.
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