Etymologically

réactionnaire

Etymology and origin of the French word réactionnaire

Confidence
Established
Formation
Derivation
First attested
1794 More words from the 18th century
Ultimate origin
Medieval Latin reactio
Etymology tree
inherited borrowed derived
Latin agō
French agir
Latin reagō
French réagir
German reagieren
Italian reagire
Latin reāctiō
French réaction
Romanian reacție
French réactionnaire
Spanish reacción
From the same root
Latin abigō ← agō
Latin āctiō ← agō
Latin āctitō ← agō
Latin āctīvus ← agō
Latin āctrīx ← agō
Latin āctus ← agō
Latin adigō ← agō
Latin age ← agō
Latin agēns ← agō
Latin agilis ← agō
Latin agitō ← agō
Latin agmen ← agō
Latin agōnia ← agō
Latin ambāgēs ← agō
Latin ambigō ← agō
Latin aurīga ← agō
Latin circumago ← agō
Latin cōgō ← agō
Latin dego ← agō
Latin exāmen ← agō
Latin exigō ← agō
Latin exīlis ← agō
Latin fatīgō ← agō
Latin indāgō ← agō
Latin nāvigō ← agō
Latin peragō ← agō
Latin prōdigō ← agō
Latin redigō ← agō
Latin rēmex ← agō
Latin subigō ← agō
See all derived words →

Pronunciation

  • /ʁe.ak.sjɔ.nɛʁ/[1]

Forms

réactionnaire (plural réactionnaires)[1]

Etymology

It is formed from French réaction + -aire, from the noun in its political sense “movement opposed to the progress that followed the Revolution” (1792).[2][3][1] The word arose during the French Revolution, when the noun strongly influenced the family of réagir.[4] réaction itself is a learned borrowing from Medieval Latin reactio.[1]

A rival word, réacteur, was formed by a change of suffix in the same year, 1794, and was used for the partisan of reaction during the 19th century before it gave way to the derivative in -aire.[4]

Earliest recorded meaning

Brunot's history of the French language records it in 1794 for a partisan of the policy of reaction; in 1796 a speech by Isnard reprinted in the Moniteur speaks of crimes réactionnaires.[2] The Grand Robert and the Petit Robert date it to 1796.[5][6]

Semantic evolution

From the Revolution's “partisans of reaction” the adjective widened, keeping its pejorative tone, to any conservative, backward-looking person or attitude: Chateaubriand wrote in 1831 of the mouvement réactionnaire du paganisme under Julian, in the sense “tending to go back”.[2][4] The noun un réactionnaire is found in Flaubert's letters in 1850.[2][4] Littré still marked the word as a neologism, for what works with the reaction against the Revolution.[7]

The familiar clipping réac became very common in 1848, according to Larchey, notably through the comic figure of Monsieur Réac.[2][4][6] Today the word is used polemically in politics, and by extension of whatever opposes social progress or changes in customs.[3][6]

English reactionary (1831) was modelled on the French word.[8]

Timeline

  • 1794 – First recorded for a partisan of the policy of reaction.[2][4]
  • 1796 – Crimes réactionnaires in a speech by Isnard.[2][9]
  • 1831 – Chateaubriand uses it in the wider sense “tending to go back”.[2]
  • 1831 – English reactionary is formed on the model of the French word.[8]
  • 1848 – The clipping réac is in wide use.[2][6]
  • 1850 – First recorded as a noun, in Flaubert's letters.[2][4]
  • 1869 – Littré records it as a neologism.[7][9]

Meanings

Adjective

  1. (politics, derogatory) Favouring political reaction: opposed to change and seeking to restore a past order or an abolished regime, as in Un sénateur réactionnaire.[2][6][3]
  2. (by extension, derogatory) Opposed to social progress and to changes in customs, as in Un roman réactionnaire.[6][3]

Noun

  1. A reactionary, a person who holds such views, as in C’est un vieux réactionnaire.[6][3][2]

Word family

  • réac

Usage notes

The familiar abbreviation réac (1848) is used as a noun and an adjective.[6][4] Older French also had réacteur in this sense.[3][4]

References

  1. ^ a b c d Wiktionary, the free dictionary, https://en.wiktionary.org
  2. ^ a b c d e f g h i j k l 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 Académie française (1992–2024), Dictionnaire de l'Académie française, 9th ed., Paris: Académie française / Fayard / Imprimerie nationale
  4. ^ a b c d e f g h i Rey, Alain, ed. (1992), Dictionnaire historique de la langue française, Paris: Le Robert
  5. ^ Rey, Alain, ed. (2005), Le Grand Robert de la langue française, electronic version, Paris: Le Robert
  6. ^ a b c d e f g h Rey-Debove, Josette; Rey, Alain, eds. (2007), Le Petit Robert de la langue française, Paris: Le Robert
  7. ^ a b Littré, Émile (1873–1877), Dictionnaire de la langue française, 4 vols. and supplement, Paris: Hachette
  8. ^ a b Harper, Douglas. Online Etymology Dictionary, https://www.etymonline.com
  9. ^ a b Guilbert, Louis; Lagane, René; Niobey, Georges, eds. (1971–1978; 1989), Grand Larousse de la langue française, Paris: Larousse
Cite this entry

“Réactionnaire.” Etymologically, 14 Nov. 2026, etymologically.com/fr/r%C3%A9actionnaire. Accessed 15 Nov. 2026.

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