Etymologically

raison

Etymology and origin of the French word raison

Confidence
Established
Formation
Inherited
First attested
c. 980, Passion de Clermont (raizun)
Inherited from
Latin ratio via Old French
Ultimate origin
Latin (reor)
Etymology tree
inherited borrowed derived
Latin ratio
English ratio
French raison

Pronunciation

  • IPA: /ʁɛ.zɔ̃/[1]
  • IPA: /ʁe.zɔ̃/[1]

Forms

raison f (plural raisons)[1]

Etymology

It is inherited from Old French raison, inherited from Latin ratiō (“reckoning, account; reason”) (accusative “ratiōnem”).[2][3][4][5][1] The Latin noun is from “ratum”, the supine of reor (“to reckon, think”), itself old and of unknown origin.[3][6] “Ratio” first meant “account, calculation”, then the faculty of reckoning and reasoning, and in philosophy it translated Ancient Greek λόγος (lógos), which meant both “account” and “reason”.[3][4]

Cicero used it for the argument that justifies an action, whence Medieval Latin “dispute, discussion” (about 600) and Old French “speech, discourse”.[4][3] Its learned doublet is ration.[1][3] Cognate with Italian ragione, Occitan rason, Spanish razón and Portuguese razão.[7][8]

Earliest recorded meaning

About 980 the Passion of Clermont opens with vera raizun, “a true account”, in the sense “speech, story”; the same text has de raizon “rightly”.[2][9]

Semantic evolution

By the 12th century the word had most of the senses of Latin ratio.[3] The sense “what is right, just” gave est raison que “it is right that” (about 1130) and avoir raison (about 1180), as opposed to tort.[2][3] About 1170 it named the faculty of judging well and the discursive intellect, as in Chrétien de Troyes.[2] The sense “account, reckoning” survived in the livre de raison, a household account book, until the 16th century.[4][3]

Raison “cause, motive” is found about 1112.[2] Bloch and Wartburg note that the Middle Ages confused Cicero's distinction between ratio, the reason one gives, and causa, the real cause; the borrowing of cause at the Renaissance restored it.[4][3] Later phrases include âge de raison (1690), mariage de raison (1826) and raison pure from Kant (1810).[2]

Timeline

  • c. 980 – Raizun “account, story” in the Passion of Clermont.[2]
  • c. 1112 – The sense “cause, motive”.[2]
  • c. 1130 – Est raison que “it is right that”.[2]
  • c. 1170 – The faculty of judgement, in Chrétien de Troyes.[2]
  • c. 1180 – Avoir raison in Marie de France.[2]
  • 1559 – Perdre la raison.[2]
  • 1690 – L'âge de raison in Bossuet.[2]
  • 1826 – Mariage de raison in Scribe.[2]

Meanings

Noun

  1. reason: the faculty of thinking and judging: la raison et la foi.[10][1]
  2. Good sense, sanity: perdre la raison, entendre raison.[2][11]
  3. A cause, motive: pour quelle raison ?, en raison de.[1][2]
  4. An argument, justification: de bonnes raisons.[2]
  5. Avoir raison: to be right, donner raison à: to side with.[2][1]
  6. (mathematics) The common difference or ratio of a progression.[1]
  7. Raison sociale: the registered name of a firm.[11]

Word family

  • arraisonner
  • déraison
  • raisonner
  • raisonnable
  • irraisonné

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 f g h i j k l m n o p q r 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
  3. ^ a b c d e f g h i Rey, Alain, ed. (1992), Dictionnaire historique de la langue française, Paris: Le Robert
  4. ^ a b c d e Bloch, Oscar; Wartburg, Walther von (1989), Dictionnaire étymologique de la langue française, 8th ed., Paris: Presses universitaires de France
  5. ^ Wartburg, Walther von, et al. (1922–2002), Französisches Etymologisches Wörterbuch, 25 vols., Bonn / Leipzig / Basel: Klopp / Teubner / Zbinden, p. 10, 105a
  6. ^ Guilbert, Louis; Lagane, René; Niobey, Georges, eds. (1971–1978; 1989), Grand Larousse de la langue française, Paris: Larousse
  7. ^ Rey-Debove, Josette; Rey, Alain, eds. (2007), Le Petit Robert de la langue française, Paris: Le Robert
  8. ^ Meyer-Lübke, Wilhelm (1935), Romanisches etymologisches Wörterbuch, 3rd ed., Heidelberg: Winter
  9. ^ Rey, Alain, ed. (2005), Le Grand Robert de la langue française, electronic version, Paris: Le Robert
  10. ^ Dictionnaire Le Robert en ligne, dictionnaire.lerobert.com (accessed 2024)
  11. ^ a b Littré, Émile (1873–1877), Dictionnaire de la langue française, 4 vols. and supplement, Paris: Hachette

Related etymologies

Cite this entry

“Raison.” Etymologically, 18 Oct. 2026, etymologically.com/fr/raison. Accessed 18 Oct. 2026.

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