Etymologically

Etymology and origin of the Portuguese word traição

Confidence
Established
Formation
Inherited
First attested
1200s Cantigas de Santa Maria, spelt trayçon More words from the 13th century
Inherited from
Latin traditio
Ultimate origin
Latin trādō
Etymology tree
inherited borrowed derived
Latin trāns
French très
Portuguese trás
Spanish tras
Italian tras-
Latin trādō
Portuguese trair
Italian tradire
Romanian trăda
Latin trāditiō
Portuguese traição
French tradition
Romanian tradiție
Italian tradizione
From the same root
English traitor ← trāns
Latin trāmes ← trāns
Latin tranquillus ← trāns
Latin trānsferō ← trāns
Latin trānstrum ← trāns
Spanish atrás ← tras
Spanish detrás ← tras
Latin trāditor ← trādō
Romanian trădare ← trādō
Romanian trădător ← trăda
French extradition ← trāditiō
Latin trāditiōnālis ← trāditiō
Spanish traicionar ← trāditiō

Pronunciation

  • Brazil: /tɾa.iˈsɐ̃w̃/, [tɾa.iˈsɐ̃ʊ̯̃], /tɾajˈsɐ̃w̃/[1]
  • Portugal: /tɾajˈsɐ̃w̃/[1]

Forms

traição f (plural traições)[1] Old Galician-Portuguese wrote trayçon, traiçom, traiçon and traïçon in the 13th century and treyçõ and treyçom in the 14th;[2][3][4] traicam is recorded in the 15th century.[2][3][4]

Etymology

It is inherited from Latin trāditiō (“a handing over, surrender”), written Old Galician-Portuguese trayçon and Old Galician-Portuguese traiçon in the oldest texts.[2][3][1] Aurélio and Caldas Aulete call it a popular word, and Nascentes explains the sense: the traitor hands a person over to the enemy.[5][6][7] The Latin noun is formed from trādō (“to hand over, deliver; to betray”) with the suffix -tiō; the verb is made of trāns- (“across”) and dō (“to give”), from Proto-Indo-European *deh₃- (“to give”).[8][1]

The same Latin word is Galician traizón, Spanish traición, French trahison and Italian tradigione, in the sense “betrayal”.[9][1] Its learned doublet is tradição “tradition”.[1][3]

Earliest recorded meaning

The Cantigas de Santa Maria use it for an act of treachery: fez aquesta trayçon “he committed this treachery”, gran traiçon y penssastes “you plotted great treachery there”, and the devil chẽo de traiçon “full of treachery”.[10][4] The troubadours have the phrase fazer traiçon sobre alguém “to betray someone”.[10] Lorenzo's chronology also refers to an earlier date, 1152, for the form traicion.[4]

Semantic evolution

The Crónica Troiana speaks of the treachery that ruined the speaker's lineage.[4] Bluteau's book of synonyms (1712–1728) pairs traiçam with perfidy, faithlessness and disloyalty.[11] Morais (1813) defines it as the breaking of a promised faith and explains à traição “from behind, treacherously”.[12] Caldas Aulete's original dictionary adds unfaithfulness in love and an ambush.[6]

Modern dictionaries add the legal sense of treason against one's country and, in Brazil (Mato Grosso), a kind of mutirão, collective farm work in which the helpers arrive unannounced at dawn and wake the farmer with songs.[2][5][13] The word passed into Tetum as traisaun.[1]

Timeline

  • 13th century – trayçon and traiçon in the Cantigas de Santa Maria.[10][3]
  • 14th century – the spelling treyçõ.[3]
  • 15th century – the spelling traicam.[2]
  • 1593 – a private letter writes treycam.[14]
  • 1697 – Pereira's dictionary translates Traição with Latin proditio and insidiae.[15]
  • 1858 – first record of traiçoeiro.[3]

Meanings

Noun

  1. betrayal: the breaking of a promised loyalty by a treacherous act; perfídia, disloyalty.[2][5][1]
  2. (law) treason: the crime of a citizen who acts against the security of his country.[2][13]
  3. infidelity in love or marriage: Ela nunca lhe perdoou a traição.[5][1]
  4. An ambush or unexpected attack;[16][17] à traição “treacherously, from behind”.[16][17]
  5. (Brazil, Mato Grosso) A mutirão in which the helpers arrive unannounced at dawn, singing, at the house of the person they help.[5][6]

Word family

  • atraiçoar
  • atraiçoador
  • traiçoeiro

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 Houaiss, Antônio; Villar, Mauro de Salles (2001), Dicionário Houaiss da língua portuguesa, Rio de Janeiro: Objetiva, p. s.v. traição
  3. ^ a b c d e f g Cunha, Antônio Geraldo da (2010), Dicionário etimológico da língua portuguesa, 4th ed., Rio de Janeiro: Lexikon, p. s.v. traição
  4. ^ a b c d e 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. trayçon
  5. ^ a b c d e Ferreira, Aurélio Buarque de Holanda, Novo dicionário Aurélio da língua portuguesa, digital edition, p. s.v. traição
  6. ^ a b c 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. traição
  7. ^ Nascentes, Antenor (1966), Dicionário etimológico resumido, Rio de Janeiro: Instituto Nacional do Livro, p. s.v. traição
  8. ^ Glare, P. G. W., ed. (2012), Oxford Latin Dictionary, 2nd ed., Oxford: Oxford University Press, p. s.v. trāditiō
  9. ^ Meyer-Lübke, Wilhelm (1935), Romanisches etymologisches Wörterbuch, 3rd ed., Heidelberg: Winter, p. 8829
  10. ^ 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. traiçon
  11. ^ Bluteau, Raphael (1712–1728), Vocabulario portuguez e latino, 8 vols. + 2 supplement vols., Coimbra / Lisboa (CLP transcription, Universidade de Aveiro), p. s.v. traiçam
  12. ^ Silva, António de Morais (1813), Diccionario da lingua portugueza, 2nd ed., 2 vols., Lisboa: Typographia Lacerdina, p. 2, 794
  13. ^ 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. traição
  14. ^ 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. traição
  15. ^ 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. traição
  16. ^ a b Dicionário Priberam da Língua Portuguesa, Lisboa: Priberam Informática, https://dicionario.priberam.org, p. s.v. traição
  17. ^ a b Porto Editora (2013), Grande Dicionário da Língua Portuguesa, Porto: Porto Editora, p. 9088

Related etymologies

Cite this entry

“Traição.” Etymologically, 15 Nov. 2026, etymologically.com/pt/trai%C3%A7%C3%A3o. Accessed 16 Nov. 2026.

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