Etymologically

Etymology and origin of the French word reflux

Confidence
Established
Formation
Derivation
First attested
1520 letters patent on the founding of Le Havre More words from the 16th century
Ultimate origin
Latin fluō
Etymology tree
inherited borrowed derived
Latin fluō
Spanish fluir
Latin flūxus
Spanish flojo
French reflux
From the same root
French fluor ← fluō
Latin affluō ← fluō
Latin circumfluō ← fluō
Latin cōnfluō ← fluō
Latin dēfluō ← fluō
Latin diffluō ← fluō
Latin effluō ← fluō
Latin flūctus ← fluō
Latin fluēns ← fluō
Latin fluentum ← fluō
Latin fluidus ← fluō
Latin fluito ← fluō
Latin flūmen ← fluō
Latin fluor ← fluō
Latin fluvius ← fluō
Latin īnfluō ← fluō
Latin interfluō ← fluō
Latin mellifluus ← fluō
Latin praefluō ← fluō
Latin praeterfluo ← fluō
Latin prōfluō ← fluō
Latin refluō ← fluō
Latin superfluō ← fluō

Pronunciation

Forms

reflux m (uncountable)[1] Older spelling reflus (Desportes); reflot was also used.[2][3]

Etymology

It is formed from French re- + flux,[4][5][6][7] and corresponds to the verb refluer.[3] The base is from Latin fluxus (“a flowing”), from fluō (“to flow”).[6] The TLFi dates the first record 1520, earlier than the 1532 of Bloch and Wartburg and the Grand Robert.[4][6][5]

Compare Italian riflusso.[2]

Earliest recorded meaning

Letters patent of August 1520 on the founding of Le Havre speak of flux et reflux de la mer, the rising and falling tide.[4]

Semantic evolution

The word first named the ebb of the sea, the falling tide.[4][3] In the second half of the 16th century Philippe Desportes used it as an image, of a fickle heart and of a crowd moving back (1573),[4][8] and it came to mean any backward movement or withdrawal.[3] Le flux et le reflux came to stand for the ups and downs of human affairs.[2][8]

Medicine uses it for the flow of a liquid in a natural duct against its normal direction (reflux gastro-œsophagien),[9][4] and chemistry for a distillation set-up (appareil à reflux).[4]

Timeline

  • 1520 – Flux et reflux de la mer in letters patent on the founding of Le Havre.[4]
  • 1532 – The date given by Bloch and Wartburg.[6]
  • 1573 – Desportes uses it figuratively and of a crowd.[4][8]

Meanings

Noun

  1. The ebb, the movement of the sea as it draws back at falling tide: le flux et le reflux.[9][2]
  2. A backward movement of a crowd or group after an advance; a retreat: le reflux de la foule.[9][2]
  3. (figurative) A decline, and with flux the vicissitudes of things.[2][1]
  4. (medicine) The flow of a liquid in a duct opposite to its normal direction: reflux gastro-œsophagien.[9][4]
  5. (chemistry) Appareil à reflux: a reflux distillation apparatus.[4]

References

  1. ^ a b c Wiktionary, the free dictionary, https://en.wiktionary.org
  2. ^ a b c d e f Littré, Émile (1873–1877), Dictionnaire de la langue française, 4 vols. and supplement, Paris: Hachette
  3. ^ a b c d Rey, Alain, ed. (1992), Dictionnaire historique de la langue française, Paris: Le Robert
  4. ^ 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
  5. ^ a b Rey, Alain, ed. (2005), Le Grand Robert de la langue française, electronic version, Paris: Le Robert
  6. ^ a b c d Bloch, Oscar; Wartburg, Walther von (1989), Dictionnaire étymologique de la langue française, 8th ed., Paris: Presses universitaires de France
  7. ^ Wartburg, Walther von, et al. (1922–2002), Französisches Etymologisches Wörterbuch, 25 vols., Bonn / Leipzig / Basel: Klopp / Teubner / Zbinden, p. 3, 646a
  8. ^ a b c Guilbert, Louis; Lagane, René; Niobey, Georges, eds. (1971–1978; 1989), Grand Larousse de la langue française, Paris: Larousse
  9. ^ 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

“Reflux.” Etymologically, 15 Nov. 2026, etymologically.com/fr/reflux. Accessed 15 Nov. 2026.

Last edited on . ·