Etymologically

Etymology and origin of the French word dissolu

Confidence
Established
Formation
Borrowing
First attested
c. 1190 Sermons de saint Bernard More words from the 12th century
Borrowed from
Latin dissolutus
Ultimate origin
Latin solvō
Etymology tree
inherited borrowed derived
Latin luō
Latin solvō
Spanish solver
English solve
Italian sol
Romanian sol
Latin dissolvō
English dissolve
Latin dissolūtus
English dissolute
French dissolu
From the same root
Latin abluō ← luō
Latin ēluō ← luō
English unsolved ← solvō
French sol ← solvō
Latin absolvō ← solvō
Latin exsolvō ← solvō
Latin īnsolūbilis ← solvō
Latin persolvō ← solvō
Latin resolvō ← solvō
Latin solūbilis ← solvō
Latin solūtiō ← solvō
Latin solūtus ← solvō
Romanian subsol ← sol
Latin dissolūtiō ← dissolvō
Latin dissolute ← dissolūtus

Forms

dissolu (feminine dissolue, masculine plural dissolus, feminine plural dissolues)[1]

Etymology

It is borrowed from Latin dissolūtus (“loose, dissipated, depraved”), the past participle of dissolvō (“to dissolve, loosen”), used as an adjective.[2][3][4] In Latin the participle meant “detached, careless”, “slack, indolent” and “loose, dissolute”, and French took it in the moral sense.[3] The verb is formed from Latin dis- + solvō (“to loosen”) and also gave French dissoudre.[2][5]

Littré notes that the literal sense is “unbound, unchained”, whence “having lost its moral restraint”.[5] Cognate with Old Occitan dissolut, Spanish disoluto and Italian dissoluto.[5]

Earliest recorded meaning

It is first found at the end of the 12th century in the phrase dissolue vie “dissolute life”, in the French Sermons of Saint Bernard.[2][6][7]

Semantic evolution

The adjective kept the moral sense it was borrowed with: of a person, living in debauchery, and of a life or of morals, marked by it.[3][6] Middle French also used it of things “spoilt, corrupt, in bad condition”,[8] and Littré's 14th-century quotations speak of lieux dissolus, places of debauchery such as taverns.[5]

In the classical period it also meant “broken, disunited”, of a bond such as a marriage, a friendship or a society.[3] A figurative literary use, “without sharpness or brightness”, is recorded in Proust before 1922.[6]

Timeline

  • c. 1190 – Dissolue vie in the Sermons of Saint Bernard.[2][9]
  • c. 1265 – The adverb, as dessoluement, in Brunetto Latini's Trésor.[2][3]
  • 14th century – Lieux dissolus “places of debauchery” in the Livre du roi Modus.[5]
  • Before 1922 – Proust uses it figuratively of a washed-out colour.[6]

Meanings

Adjective

  1. (literary) Of a person: living in debauchery, dissolute, profligate.[10][2][1]
  2. Of a life or of morals: marked by debauchery, depraved: vie dissolue, mœurs dissolues.[10][6]
  3. (figurative, literary) Without sharpness or brightness.[6]

Word family

  • dissolument

Usage notes

The adverb dissolument “dissolutely” is now dated.[2][3]

References

  1. ^ a b Wiktionary, the free dictionary, https://en.wiktionary.org
  2. ^ a b c d e f g 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 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. 12, 83b
  5. ^ a b c d e Littré, Émile (1873–1877), Dictionnaire de la langue française, 4 vols. and supplement, Paris: Hachette
  6. ^ a b c d e f Guilbert, Louis; Lagane, René; Niobey, Georges, eds. (1971–1978; 1989), Grand Larousse de la langue française, Paris: Larousse
  7. ^ Tobler, Adolf; Lommatzsch, Erhard (1925–2002), Altfranzösisches Wörterbuch, 11 vols., Berlin / Wiesbaden / Stuttgart: Weidmann / Steiner, p. 2:1956
  8. ^ Dictionnaire du Moyen Français, version 2015 (DMF 2015), ATILF – CNRS & Université de Lorraine, atilf.fr/dmf
  9. ^ Rey, Alain, ed. (2005), Le Grand Robert de la langue française, electronic version, Paris: Le Robert
  10. ^ a b Rey-Debove, Josette; Rey, Alain, eds. (2007), Le Petit Robert de la langue française, Paris: Le Robert

Related etymologies

Cite this entry

“Dissolu.” Etymologically, 15 Nov. 2026, etymologically.com/fr/dissolu. Accessed 15 Nov. 2026.

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