Etymologically

Etymology and origin of the Portuguese word traidor

Confidence
Established
Formation
Inherited
First attested
1228 a Galician-Portuguese document, spelt traedor More words from the 13th century
Inherited from
Latin traditor
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 trāditor
French traître
Italian traditore
Portuguese traidor
Spanish traidor
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 trāditiō ← trādō
Romanian trădare ← trādō
Romanian trădător ← trăda

Pronunciation

  • Brazil: /tɾa.iˈdoʁ/, [tɾa.iˈdoh], /tɾajˈdoʁ/[1]
  • São-Paulo: /tɾa.iˈdoɾ/, /tɾajˈdoɾ/, [tɾaɪ̯ˈdoɾ][1]
  • Rio-de-Janeiro: /tɾa.iˈdoʁ/, [tɾa.iˈdoχ], /tɾajˈdoʁ/[1]
  • Caipira: /tɾa.iˈdoɻ/, /tɾajˈdoɻ/, [tɾaɪ̯ˈdoɻ][1]

Forms

traidor m (plural traidores, feminine traidora, feminine plural traidoras)[1] Old Galician-Portuguese wrote traedor, treedor and traydor; later forms are trahedor (14th century), tredor and treidor (15th), tredoro (1552) and tredro (1613).[2][3][4] Feijó (1734) insists on traidor, not tredor.[5]

Etymology

It is inherited from Latin trāditor (“one who hands over; traitor”), written Old Galician-Portuguese traedor in the oldest texts.[2][3][1][4] Nascentes says the modern form was remade from the old treedor and tredor.[6]

The same Latin word is Galician traidor, Spanish traidor, Catalan traïdor, French traître, Italian traditore and Romanian trădător.[7][1]

The Latin noun is formed from trādō (“to hand over, give up”) with the agent suffix -tor.[8][1] Wiktionary analyses the verb as trāns (“across”) and dō (“to give”).[1]

Earliest recorded meaning

A document of 1228 already uses it as an insult, punishing whoever disser a seu uiçino mãa paraula, traedor “says an evil word to his neighbour, ‘traitor’”.[4] The Cantigas de Santa Maria use it often, also as a mere insult (Don vilão traedor), and the cantigas d'escarnho have the plural traedores.[4] Houaiss and Cunha date it to the 13th century.[2][3]

Semantic evolution

The adjectival use is medieval: the cantigas of Universo Cantigas have traedor both as a noun and as an adjective, as in falso treedor.[9] Cardoso (1569) glosses Traidor with Latin proditor, and Pereira (1697) adds traditor and perfidus.[10][11]

Houaiss records the modern adjectival senses “compromising, giving someone away”, as of a voice, and “dangerous without seeming so”, as of a current.[2] Silva Bastos (1912) lists a slang sense “shoe”.[12]

Timeline

  • 1228 – traedor as an insult in a Galician-Portuguese document.[4]
  • 13th century – traedor and treedor in the Cantigas de Santa Maria and the cantigas d'escarnho.[4][3]
  • 14th century – the form trahedor.[2]
  • 15th century – the forms tredor and treidor.[2]
  • 1569 – Cardoso's dictionary has Traidor.[10]
  • 1613 – the form tredro.[2]
  • 1734 – Feijó rejects tredor in favour of traidor.[5]

Meanings

Noun

  1. A traitor, one who betrays a person, a cause or a country.[2][13][1]

Adjective

  1. Treacherous, disloyal.[2][14][1]
  2. That gives someone away; compromising: Foi apanhado pelo sotaque traidor.[2][1]
  3. Dangerous while looking safe: um rio traidor.[2][15]

Word family

  • traidoramente

References

  1. ^ a b c d e f g h i j k l Wiktionary, the free dictionary, https://en.wiktionary.org
  2. ^ a b c d e f g h i j k Houaiss, Antônio; Villar, Mauro de Salles (2001), Dicionário Houaiss da língua portuguesa, Rio de Janeiro: Objetiva, p. s.v. traidor
  3. ^ a b c d 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 f 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. traedor
  5. ^ a b Feijó, João de Morais Madureira (1734), Orthographia, ou Arte de escrever, e pronunciar com acerto a lingua portugueza, Lisboa (CLP transcription, Universidade de Aveiro), p. s.v. traidor
  6. ^ Nascentes, Antenor (1966), Dicionário etimológico resumido, Rio de Janeiro: Instituto Nacional do Livro, p. s.v. traidor
  7. ^ Meyer-Lübke, Wilhelm (1935), Romanisches etymologisches Wörterbuch, 3rd ed., Heidelberg: Winter
  8. ^ Glare, P. G. W., ed. (2012), Oxford Latin Dictionary, 2nd ed., Oxford: Oxford University Press, p. s.v. trāditor
  9. ^ Universo Cantigas: Glosario da poesía medieval profana galego-portuguesa, A Coruña: Instituto da Lingua e Literatura (ILLA), Universidade da Coruña, https://www.universocantigas.gal, p. s.v. traedor
  10. ^ a b Cardoso, Jerónimo (1569–1570), Dictionarium ex lusitanico in latinum sermonem, Lisboa: João Álvares (CLP transcription, Universidade de Aveiro), p. s.v. traidor
  11. ^ 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. traidor
  12. ^ Silva Bastos, José Timóteo da (1912), Diccionario etymologico, prosodico e orthographico da lingua portugueza, Lisboa: Parceria António Maria Pereira, p. s.v. traidor
  13. ^ 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. traidor
  14. ^ Dicionário Priberam da Língua Portuguesa, Lisboa: Priberam Informática, https://dicionario.priberam.org, p. s.v. traidor
  15. ^ Ferreira, Aurélio Buarque de Holanda, Novo dicionário Aurélio da língua portuguesa, digital edition, p. s.v. traidor

Related etymologies

Cite this entry

“Traidor.” Etymologically, 15 Nov. 2026, etymologically.com/pt/traidor. Accessed 16 Nov. 2026.

Last edited on . ·