Etymologically

Etymology and origin of the French word inflexion

Confidence
Established
Formation
Borrowing
First attested
c. 1380 Évrart de Conty, translation of the Problems of Aristotle More words from the 14th century
Borrowed from
Latin inflexio
Ultimate origin
Latin flectō
Etymology tree
inherited borrowed derived
Latin flectō
Latin īnflectō
English inflect
Latin īnflexiō
English inflection
French inflexion
From the same root
Latin dēflectō ← flectō
Latin flexibilis ← flectō
Latin flexilis ← flectō
Latin flexiō ← flectō
Latin flexūra ← flectō
Latin flexus ← flectō
Latin genūflectō ← flectō
Latin reflectō ← flectō

Pronunciation

  • /ɛ̃.flɛk.sjɔ̃/[1]

Forms

inflexion f (plural inflexions)[1]

Etymology

It is borrowed from Latin inflexiō (“a bending”), which in Late Latin was also a term of grammar,[2][3][4] from inflexus, the past participle of inflectō (“to bend, inflect”),[2][5] formed from in- and flectō (“to bend”).[3][5] The verb infléchir was formed later (1738) from it, on the model of flexion beside fléchir.[6]

Earliest recorded meaning

Its first record, in Évrart de Conty’s translation of the Problems of Aristotle at the end of the 14th century (in a 15th-century manuscript), uses it for a curvature: the belly has no inflexions ou incurvations.[2][5]

Semantic evolution

The word was rare before the 17th century.[6][3][5] Its first sense, the state of something bent or the movement by which it bends, is now learned.[3] In 1636 Monet records it for a change of tone in the voice, and in 1690 Furetière gives it as a grammatical term, an equivalent of flexion.[2][3]

From the sense “bending” came scientific uses: in optics, Voltaire wrote of the inflexion de la lumière in 1739, and the Encyclopédie (1765) has the geometric point d’inflexion of a curve.[2][3] Figuratively, it was used from 1828 (Sainte-Beuve) for a change in the direction of a thought or feeling.[3] In phonetics (1893) inflexion vocalique is the change in a vowel’s quality under the influence of a neighbouring sound.[3][7]

Timeline

  • Late 14th century – Évrart de Conty uses inflexion for a curvature.[2]
  • 1636 – Monet records the sense “change of tone in the voice”.[2][3]
  • 1690 – Furetière gives it as a grammatical term.[2][3]
  • 1739 – Voltaire writes of the inflexion de la lumière.[2][3]
  • 1765 – The Encyclopédie has point d’inflexion in geometry.[2][3]
  • 1828 – Sainte-Beuve uses it for a change in the direction of a thought.[3]
  • 1893 – Inflexion vocalique appears in phonetics.[3][7]

Meanings

Noun

  1. A slight bending or bow of the body or head: une légère inflexion de la tête.[8][7]
  2. A change of direction or course, as of a road or river.[8]
  3. (mathematics) Point d’inflexion: the inflection point of a curve, where its concavity changes.[8][9]
  4. A change of tone or pitch in the voice.[8][9]
  5. (figurative) A shift in the direction of a policy, a thought or a feeling.[3][7]
  6. (phonetics) Inflexion vocalique: vowel mutation under the influence of a neighbouring sound.[3][1]

Word family

  • infléchir
  • point d'inflexion

References

  1. ^ a b c Wiktionary, the free dictionary, https://en.wiktionary.org
  2. ^ a b c d e f g h i j 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 j k l m n o p Rey, Alain, ed. (1992), Dictionnaire historique de la langue française, Paris: Le Robert
  4. ^ Wartburg, Walther von, et al. (1922–2002), Französisches Etymologisches Wörterbuch, 25 vols., Bonn / Leipzig / Basel: Klopp / Teubner / Zbinden, p. 4, 676a
  5. ^ a b c d Rey, Alain, ed. (2005), Le Grand Robert de la langue française, electronic version, Paris: Le Robert
  6. ^ a b Bloch, Oscar; Wartburg, Walther von (1989), Dictionnaire étymologique de la langue française, 8th ed., Paris: Presses universitaires de France
  7. ^ a b c d Guilbert, Louis; Lagane, René; Niobey, Georges, eds. (1971–1978; 1989), Grand Larousse de la langue française, Paris: Larousse
  8. ^ a b c d Rey-Debove, Josette; Rey, Alain, eds. (2007), Le Petit Robert de la langue française, Paris: Le Robert
  9. ^ a b Littré, Émile (1873–1877), Dictionnaire de la langue française, 4 vols. and supplement, Paris: Hachette

Related etymologies

Cite this entry

“Inflexion.” Etymologically, 15 Nov. 2026, etymologically.com/fr/inflexion. Accessed 15 Nov. 2026.

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