Etymology and origin of the French word trahison
- Confidence
- Probable
- Formation
- Derivation
- First attested
- c. 1100 Chanson de Roland More words from the 11th century
- Ultimate origin
- Latin trādō
Pronunciation
- /tʁa.i.zɔ̃/[1]
Forms
trahison f (plural trahisons)[1] Old French traïsun and traïson;[2][3] trahison is found in the 13th century and became the usual spelling in the 16th.[2][3] Anglo-Norman forms include treson and treïsoun.[4]
Etymology
It is inherited from Old French traïsun, from Old French traïr (“to betray”) + -ison, the first being the old form of trahir.[5][6][3][1] The TLFi analyses the ending as the suffix -on.[5] Littré and Meyer-Lübke instead derive it from Latin trāditiō (“handing over, betrayal”), the source of the learned tradition, and Wiktionary allows both.[7][8][1] The old verb itself is a remodelling of Latin trādō (“to hand over, betray”) on the verbs in ⟨-ir⟩.[9] The ⟨h⟩ was written to keep the two vowels apart.[9]
Cognate with Old Occitan traizon, Catalan traïció, Spanish traición and Portuguese traição.[8][7]
Earliest recorded meaning
It first appears as traïsun in the Chanson de Roland (about 1100), meaning betrayal: Guenes i vint, ki la traïson fist “Guenes came there, he who committed the treason”.[5][7]
Semantic evolution
In Old French par traïson meant “treacherously” (about 1160).[5] The Anglo-French form gave English treason about 1200,[10] and English law French had graunt treysoun “high treason” in 1292.[5]
Haute trahison is a calque of the English high treason, itself made with the borrowed French word.[9][3][2] Bloch and Wartburg date it to 1677 and the TLFi to 1649; it was first said only of English events and replaced lèse-majesté for French ones towards the end of the 18th century.[9][5] Its modern sense, dealings with the enemy, dates from the Code pénal of 1810, and its use for a grave failure of the President of the Republic from 1876.[2][3]
Since 1673 (Racine) the word has also meant unfaithfulness in love,[2][3] and since 1642 (Corneille) it has meant the distortion of someone's thought in presenting it.[3][2] Littré records la trahison des sens, the surprise victory of the senses over reason.[7]
Timeline
- c. 1100 – Traïsun appears in the Chanson de Roland.[5]
- c. 1160 – Par traïson “treacherously” in the Roman d'Eneas.[5]
- c. 1200 – English treisoun is borrowed from Anglo-French.[10]
- 13th century – The spelling trahison in the Chronique de Rains.[2][7]
- 1292 – Graunt treysoun “high treason” in Britton.[5]
- 1538 – The refashioned form trahison.[3]
- 1642 – Corneille uses it of distorting someone's thought.[2][3]
- 1649 – First record of haute trahison in the TLFi.[5]
- 1673 – Racine uses it for unfaithfulness in love.[2][3]
- 1677 – Haute trahison, calqued on English, in Bloch and Wartburg's dating.[9][3]
- 1810 – The Code pénal gives haute trahison its modern sense.[2][3]
Meanings
Noun
- treason, the crime of betraying one's country or going over to the enemy;[11][7] haute trahison, high treason, also a grave breach of duty by the President of the Republic.[11][7]
- Betrayal, a breach of loyalty or trust; treachery.[11][5]
- Serious unfaithfulness in love.[11][7]
- (figurative) Something that catches one out unexpectedly, a pitfall: la trahison des sens.[7][1]
Word family
- haute trahison
Related words
References
- ^ a b c d e Wiktionary, the free dictionary, https://en.wiktionary.org
- ^ a b c d e f g h i j Guilbert, Louis; Lagane, René; Niobey, Georges, eds. (1971–1978; 1989), Grand Larousse de la langue française, Paris: Larousse
- ^ a b c d e f g h i j k l Rey, Alain, ed. (1992), Dictionnaire historique de la langue française, Paris: Le Robert
- ^ Anglo-Norman Dictionary (AND2), Aberystwyth University, anglo-norman.net (2nd ed., 2005–)
- ^ a b c d e f g h i j k Trésor de la langue française informatisé (2004), ATILF – CNRS & Université de Lorraine, atilf.fr/tlfi; electronic version of Imbs, Paul; Quemada, Bernard, eds. (1971–1994), Trésor de la langue française, Paris: CNRS / Gallimard
- ^ Rey, Alain, ed. (2005), Le Grand Robert de la langue française, electronic version, Paris: Le Robert
- ^ a b c d e f g h i Littré, Émile (1873–1877), Dictionnaire de la langue française, 4 vols. and supplement, Paris: Hachette
- ^ a b Meyer-Lübke, Wilhelm (1935), Romanisches etymologisches Wörterbuch, 3rd ed., Heidelberg: Winter
- ^ a b c d e Bloch, Oscar; Wartburg, Walther von (1989), Dictionnaire étymologique de la langue française, 8th ed., Paris: Presses universitaires de France
- ^ a b Harper, Douglas. Online Etymology Dictionary, https://www.etymonline.com
- ^ a b c d Rey-Debove, Josette; Rey, Alain, eds. (2007), Le Petit Robert de la langue française, Paris: Le Robert
Cite this entry
“Trahison.” Etymologically, 14 Nov. 2026, etymologically.com/fr/trahison. Accessed 14 Nov. 2026.
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