Etymologically

Etymology and origin of the Portuguese word razão

Confidence
Established
Formation
Inherited
First attested
1200s spelt razon More words from the 13th century
Inherited from
Latin ratio
Ultimate origin
Latin reor
Etymology tree
inherited borrowed derived
Latin reor
Latin ratus
Latin ratiō
French raison
Italian ragione
Portuguese razão
Spanish razón
English ratio
French ration
English ration
Spanish ración
From the same root
Latin irritus ← ratus
Latin rata ← ratus
Latin ratiōcinor ← ratiō
Latin ratiōnābilis ← ratiō
Latin ratiōnālis ← ratiō
French raisonnable ← raison
Italian ragionevole ← ragione
Spanish razonable ← razón

Pronunciation

  • Brazil: /ʁaˈzɐ̃w̃/, [haˈzɐ̃ʊ̯̃][1]
  • Rio-de-Janeiro: /ʁaˈzɐ̃w̃/, [χaˈzɐ̃ʊ̯̃][1]
  • Portugal: /ʁɐˈzɐ̃w̃/[1]

Forms

razão f (plural razões)[1] Old Galician-Portuguese wrote razon, razõ and rrazon; the 15th century has raçom, rezão and rezam, and rasão is recorded in 1789.[2] Rezão survives in the dialects of Portugal.[3]

Etymology

It is inherited from Latin ratiō (“reckoning, account; reason”), written Old Galician-Portuguese razon in the oldest texts.[2][4][1] Nascentes explains the sense: the idea of thinking leads to comparing, looking for relations and finding causes.[4] The learned ração “ration” and rácio “ratio” are its doublets.[1][5]

The same Latin word is Galician razón, Spanish razón, Catalan raó, French raison and Italian ragione.[5][1]

De Vaan derives the Latin noun from ratus (“counted, fixed”), the past participle of reor (“to think, believe”), whose first sense was “to count”; he reconstructs Proto-Indo-European *Hreh₁- and compares Gothic 𐍂𐌰𐌸𐌾𐍉 (raþjō, “number, account”).[6]

Earliest recorded meaning

In the 13th-century Cancioneiro da Ajuda razon means “reason, reasoning”, “right, justice” (fazer razon “to act justly”), “motive, cause” and the text or subject of a song as opposed to its melody, the som.[7] The cantigas d'amigo have teer por razon “to consider just”.[7]

Semantic evolution

Barbosa (1611) records razão natural and he razão “it is right”.[8] The commercial razão, masculine, is the ledger in which a merchant enters debits and credits.[9][10] Mathematics uses the word for the ratio of two quantities, and philosophy for the faculty of thought that sets humans apart from other animals.[2][11] The word passed into Papiamentu as rason.[1]

Timeline

  • 13th century – razon, razõ and the plural razões.[2]
  • 13th century, second half – the Cancioneiro da Ajuda uses razon for reason, right, motive and the text of a song.[7]
  • 15th century – the forms raçom, rezão and rezam.[2]
  • 1518 – razão in the Espelho de Cristina.[12]
  • 1538 – Rezam in a private letter.[13]
  • 1569 – Cardoso translates Razão as Latin ratio.[14]
  • 1611 – Barbosa records razão natural.[8]
  • 1789 – the spelling rasão.[2]

Meanings

Noun

  1. reason, the faculty of thinking, understanding and judging.[2][15][1]
  2. Good sense, judgement; sound mind: perder a razão “to lose one's reason”.[2][16]
  3. cause, motive: Ninguém sabe a razão da demora.[2][15][1]
  4. An argument or justification, often in the plural.[2][16]
  5. Rightness; justice: ter razão “to be right”.[2][15][1]
  6. (mathematics) A ratio;[11][16][1] (finance) a percentage, rate of interest.[11][16][1]
  7. (old) News, information.[2][16]
  8. (masculine, bookkeeping) A ledger.[10][16]

Word family

  • raciocinar
  • raciocínio
  • racional
  • ração
  • rácio
  • Latin ratio
  • Galician razón

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 Houaiss, Antônio; Villar, Mauro de Salles (2001), Dicionário Houaiss da língua portuguesa, Rio de Janeiro: Objetiva, p. s.v. razão
  3. ^ 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. razão
  4. ^ a b Nascentes, Antenor (1966), Dicionário etimológico resumido, Rio de Janeiro: Instituto Nacional do Livro, p. s.v. razão
  5. ^ a b Meyer-Lübke, Wilhelm (1935), Romanisches etymologisches Wörterbuch, 3rd ed., Heidelberg: Winter, p. 7086
  6. ^ 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. reor
  7. ^ a b c 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. razon
  8. ^ a b Barbosa, Agostinho (1611), Dictionarium lusitanicolatinum, Braga: Fructuoso Lourenço de Basto (CLP transcription, Universidade de Aveiro), p. s.v. razão
  9. ^ Silva Bastos, José Timóteo da (1912), Diccionario etymologico, prosodico e orthographico da lingua portugueza, Lisboa: Parceria António Maria Pereira, p. s.v. razão
  10. ^ 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. razão
  11. ^ a b c 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. razão
  12. ^ Centro de Linguística da Universidade de Lisboa, CTA – Corpus de Textos Antigos, https://teitok.clul.ul.pt/cta, p. s.v. razão
  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. razão
  14. ^ Cardoso, Jerónimo (1569–1570), Dictionarium ex lusitanico in latinum sermonem, Lisboa: João Álvares (CLP transcription, Universidade de Aveiro), p. s.v. razão
  15. ^ a b c Ferreira, Aurélio Buarque de Holanda, Novo dicionário Aurélio da língua portuguesa, digital edition, p. s.v. razão
  16. ^ a b c d e f Porto Editora (2013), Grande Dicionário da Língua Portuguesa, Porto: Porto Editora, p. 7791

Related etymologies

Cite this entry

“Razão.” Etymologically, 15 Nov. 2026, etymologically.com/pt/raz%C3%A3o. Accessed 16 Nov. 2026.

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