Etymologically

Etymology and origin of the Portuguese word trair

Confidence
Established
Formation
Inherited
First attested
1200s Cantigas de Santa Maria, spelt traer More words from the 13th century
Inherited from
Latin trado
Ultimate origin
Latin dō
Etymology tree
inherited borrowed derived
Latin trāns
French très
Portuguese trás
Spanish tras
Italian tras-
Latin trādō
Portuguese trair
Italian tradire
Romanian trăda
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
Latin trāditor ← trādō
Romanian trădare ← trādō
Romanian trădător ← trăda

Pronunciation

  • Brazil: /tɾaˈi(ʁ)/, [tɾaˈi(h)][1]
  • São-Paulo: /tɾaˈi(ɾ)/[1]
  • Rio-de-Janeiro: /tɾaˈi(ʁ)/, [tɾaˈi(χ)][1]
  • Caipira: /tɾaˈi(ɻ)/[1]

Forms

trair (first-person singular present traio, first-person singular preterite traí, past participle traído)[1] Old Galician-Portuguese wrote traer, past participle traudo.[2][3] Houaiss has trayu and treeu in the 14th century, traahem in the 15th and the spelling trahir from 1642.[4] Vieira (1871–1874) still heads the verb trair or trahir.[5]

Etymology

It is inherited from Latin trādō (“to hand over; to betray”), and was written Old Galician-Portuguese traer in the oldest texts.[4][3][1][6][7] The Latin verb is formed from trāns (“across”) and dō (“to give”).[1][8][4] Its first sense is “to hand over”, and Nascentes explains the shift: the traitor hands a person over to his enemies.[6][4] The sense “to betray” is already Latin: Niermeyer lists it in medieval texts, and Du Cange cites the old translator of the Gospels, who used the verb for Judas.[9][10]

The same Latin verb is Italian tradire, French trahir, Catalan trair, Romanian trăda and the obsolete Old Spanish traer.[11][12][13] French continues a popular Latin *tradiō, an alteration of the classical verb.[14]

Earliest recorded meaning

The Cantigas de Santa Maria tell of a woman's irmão muy falsso, que a foy traer “very false brother, who went and betrayed her”, and use the participle traudo “betrayed”.[2] In the cantigas d'escarnho, Airas Perez Vuitoron has quen trae castelo “whoever betrays a castle”, that is, hands it over to the enemy.[2] Houaiss dates the verb to the 13th century.[4]

Semantic evolution

The medieval verb is used of handing over a castle or a person treacherously, as in the Crónica Troiana, where Achilles understands that he has been betrayed.[2] Bluteau (1712–1728) wrote that he could not remember finding trair in any Portuguese author and preferred fazer traição.[15] Morais (1789) nevertheless quotes it from Leão, Castanheda, Arraes, Ferreira and Barros, in the spelling trahir.[16]

Later senses extend it to unfaithfulness in love, to breaking a promise or a principle, to failing someone's hopes, and to revealing something without meaning to; reflexively, trair-se is to give oneself away.[4][17][7] Porto Editora also records “to translate badly”.[18]

Timeline

  • 13th century – traer and the participle traudo in the Cantigas de Santa Maria.[2]
  • 14th century – the forms trayu and treeu.[4]
  • 1642 – the spelling trahir.[4]
  • 1697 – Pereira glosses Trair with Latin prodo and trado.[19]
  • 1712–1728 – Bluteau doubts that Portuguese authors use the verb.[15]
  • 1789 – Morais heads it trair and quotes it from 16th-century authors.[16]

Meanings

Verb

  1. To betray; to deceive treacherously: Jurou que nunca trairia os amigos.[4][20][1]
  2. To hand over or denounce someone in an act of treachery.[4][20]
  3. To be unfaithful to; to cheat on (a partner): Descobriu que a mulher o traía.[4][1][21]
  4. To abandon a belief or principle treacherously.[4]
  5. To break (a promise, an oath or a duty).[4][17]
  6. To reveal unintentionally: A voz traiu o seu medo.[4][17]
  7. (reflexive) To give oneself away.[4][22]
  8. To fail to live up to (expectations); to let down.[4][17]
  9. (figurative) To translate badly.[18]

References

  1. ^ a b c d e f g h i Wiktionary, the free dictionary, https://en.wiktionary.org
  2. ^ 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. traer
  3. ^ a b 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 g h i j k l m n o p Houaiss, Antônio; Villar, Mauro de Salles (2001), Dicionário Houaiss da língua portuguesa, Rio de Janeiro: Objetiva, p. s.v. trair
  5. ^ Vieira, Frei Domingos (1871–1874), Grande Diccionario Portuguez ou Thesouro da lingua portugueza, 5 vols., Porto: Ernesto Chardron e Bartholomeu H. de Moraes, p. 5, 786
  6. ^ a b Nascentes, Antenor (1966), Dicionário etimológico resumido, Rio de Janeiro: Instituto Nacional do Livro, p. s.v. trair
  7. ^ 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. trair
  8. ^ Glare, P. G. W., ed. (2012), Oxford Latin Dictionary, 2nd ed., Oxford: Oxford University Press, p. s.v. trādō
  9. ^ Niermeyer, J. F. (1976), Mediae Latinitatis Lexicon Minus, Leiden: Brill, p. s.v. tradere
  10. ^ du Cange, Charles du Fresne, et al. (1883–1887), Glossarium mediae et infimae latinitatis, augmented ed. by Léopold Favre, Niort: L. Favre, p. s.v. tradere
  11. ^ Meyer-Lübke, Wilhelm (1935), Romanisches etymologisches Wörterbuch, 3rd ed., Heidelberg: Winter, p. tradere
  12. ^ Nascentes, Antenor (1955), Dicionário etimológico da língua portuguesa, vol. 1: Nomes comuns, Rio de Janeiro (1st ed. 1932, preface by W. Meyer-Lübke), p. s.v. trair
  13. ^ 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. traer
  14. ^ Rey, Alain, ed. (1992), Dictionnaire historique de la langue française, Paris: Le Robert, p. s.v. trahir
  15. ^ a b Bluteau, Raphael (1712–1728), Vocabulario portuguez e latino, 8 vols. + 2 supplement vols., Coimbra / Lisboa (CLP transcription, Universidade de Aveiro), p. s.v. trair
  16. ^ a b 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. 2, 474
  17. ^ a b c d 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. trair
  18. ^ a b Porto Editora (2013), Grande Dicionário da Língua Portuguesa, Porto: Porto Editora, p. 9089
  19. ^ 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. trair
  20. ^ a b Ferreira, Aurélio Buarque de Holanda, Novo dicionário Aurélio da língua portuguesa, digital edition, p. s.v. trair
  21. ^ Schlee, Aldyr Garcia (2019), Dicionário da Cultura Pampeana Sul-Rio-Grandense, 2 vols., Pelotas: Fructos do Paiz, p. s.v. trair
  22. ^ Dicionário Priberam da Língua Portuguesa, Lisboa: Priberam Informática, https://dicionario.priberam.org, p. s.v. trair

Related etymologies

Cite this entry

“Trair.” Etymologically, 15 Nov. 2026, etymologically.com/pt/trair. Accessed 16 Nov. 2026.

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