Etymologically

Etymology and origin of the French word cailler

Confidence
Established
Formation
Inherited
First attested
c. 1120 Oxford Psalter More words from the 12th century
Inherited from
Latin coagulo via Old French
Ultimate origin
Latin coāgulō
Etymology tree
inherited borrowed derived
Latin agō
French agir
Latin cōgō
Latin coāgulum
Latin coāgulō
French cailler
Italian cagliare
Spanish cuajar
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 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 reagō ← agō
Latin redigō ← agō
Latin rēmex ← agō
Latin subigō ← agō
See all derived words →

Pronunciation

Forms

cailler[1] Old French coaillier, quailler.[2][1][3]

Etymology

It is inherited from Old French coaillier, inherited from Latin coāgulō (“to curdle, to congeal”).[4][5][6] Wiktionary gives a Vulgar Latin syncopated form *coaglō.[1] Littré explains the change by the loss of the short ⟨u⟩, which gave the Old French form and finally the modern one.[1][7] The Latin verb is formed on coāgulum (“rennet, curdled milk”), from cōgō (“to drive together”), a compound of co- and agō (“to drive”).[6] The learned doublet is coaguler.[1][2]

Cognate with Italian quagliare, Occitan calhar, Spanish cuajar, Portuguese coalhar and Romanian închega.[8][9]

Earliest recorded meaning

The Oxford Psalter (early 12th century) has coailliez est, sicume lait “it is curdled like milk”, of the heart: the verb meant to curdle or congeal.[4][7][3]

Semantic evolution

The verb, used intransitively, transitively and reflexively, has always meant to curdle or clot, of milk and blood; the participle lait caillé gave the noun caillé in the early 14th century.[6][4] In familiar speech of the early 20th century, with a person as subject, it took the sense “to be frozen with cold” (on caille, on se caille), and impersonally ça caille “it is freezing”.[6][10]

Timeline

  • c. 1120 – Coaillier appears in the Oxford Psalter.[6][3][4]
  • Early 14th century – The noun caillé arises from lait caillé.[4]
  • 1478 – The derivative caillement is recorded.[4][6]
  • Early 20th century – It is used familiarly for “to be cold”.[6]

Meanings

Verb

  1. (transitive) To curdle or clot, of milk or blood: la présure caille le lait.[10][4]
  2. (intransitive, reflexive) To curdle, form caillots: le lait a caillé, le sang se caille.[10][4]
  3. (familiar) To be very cold: on caille, on se caille; impersonally ça caille, it is freezing.[10][6][1]

Word family

  • caillement
  • caillebotter
  • caillé
  • caillage

Usage notes

Littré has a separate noun cailler, from caille “quail”: a device for catching quails, or a call imitating their cry, found in the 15th century as caillier.[7]

References

  1. ^ a b c d e f g h Wiktionary, the free dictionary, https://en.wiktionary.org
  2. ^ a b Rey, Alain, ed. (2005), Le Grand Robert de la langue française, electronic version, Paris: Le Robert
  3. ^ a b c Guilbert, Louis; Lagane, René; Niobey, Georges, eds. (1971–1978; 1989), Grand Larousse de la langue française, Paris: Larousse
  4. ^ a b c d e f g h 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
  5. ^ Wartburg, Walther von, et al. (1922–2002), Französisches Etymologisches Wörterbuch, 25 vols., Bonn / Leipzig / Basel: Klopp / Teubner / Zbinden, p. 2, 816a
  6. ^ a b c d e f g h Rey, Alain, ed. (1992), Dictionnaire historique de la langue française, Paris: Le Robert
  7. ^ a b c Littré, Émile (1873–1877), Dictionnaire de la langue française, 4 vols. and supplement, Paris: Hachette
  8. ^ Meyer-Lübke, Wilhelm (1935), Romanisches etymologisches Wörterbuch, 3rd ed., Heidelberg: Winter
  9. ^ Bloch, Oscar; Wartburg, Walther von (1989), Dictionnaire étymologique de la langue française, 8th ed., Paris: Presses universitaires de France
  10. ^ a b c d Rey-Debove, Josette; Rey, Alain, eds. (2007), Le Petit Robert de la langue française, Paris: Le Robert

Related etymologies

Cite this entry

“Cailler.” Etymologically, 14 Nov. 2026, etymologically.com/fr/cailler. Accessed 15 Nov. 2026.

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