Etymologically

Etymology and origin of the French word fiancer

Confidence
Established
Formation
Derivation
First attested
c. 1170 Chrétien de Troyes, Erec et Enide More words from the 12th century
Ultimate origin
Latin fīdus
Etymology tree
inherited borrowed derived
French fier
French fiancer
Derivations
From the same root
French défiance ← fier
French défier ← fier
French méfier ← fier

Pronunciation

  • /fjɑ̃.se/[1]
  • /fi.jɑ̃.se/[1]

Forms

fiancer[1] Old French fiancier, Picard fianchier;[2][3][4] Anglo-Norman fiancer and fiauncer.[2][3][4]

Etymology

It is formed from French fiance (“pledge, trust”) + -er, first as Old French fiancier.[3][1][5] The noun fiance, “oath of fealty” and later “trust”, is from French fier1 (“to trust”), with the suffix -ance.[3][6] The verb fier1 comes from Vulgar Latin *fīdō (“to entrust”), formed from Latin fīdus (“faithful”).[7][8]

Meyer-Lübke lists Italian fidanzare “to betroth” and Old Occitan fizansar “to promise” beside it;[8] Littré gives the Occitan form as fiansar.[9]

Earliest recorded meaning

Its first sense was “to pledge one's word, to promise on oath”: the TLFi's first record is in Chrétien de Troyes's Erec et Enide, about 1170.[3][6][5] Littré quotes a 12th-century line where the two sides jurer et fiancier (“swear and pledge”) never to start a war again.[9]

Semantic evolution

The sense “to engage oneself to marry a woman” is found in Gerbert de Montreuil's Violette (1225–1229),[3][6] and Bloch and Wartburg date the modern sense to Beaumanoir in 1283, the older sense “to make an engagement” lasting until the 15th century.[7] Froissart still used it of a captured knight pledging himself as prisoner.[9] The past participle was used as a noun, fiancée, by 1367, and the reflexive se fiancer is recorded from 1736.[3][6]

From 1833 the verb is used figuratively, “to unite harmoniously”, a literary use found in Quinet and later in Verlaine.[3][6][2]

Timeline

  • c. 1170 – Chrétien de Troyes uses fiancier for “to pledge one's word”.[3]
  • 1225–1229 – Gerbert de Montreuil uses it for promising to marry a woman.[3]
  • 1283 – Beaumanoir has the modern sense.[7][2]
  • 1367 – Fyancee is used as a noun.[3]
  • 1736 – Voltaire uses the reflexive se fiancer.[3][6]
  • 1833 – Quinet uses it figuratively for “to unite harmoniously”.[3]

Meanings

Verb

  1. (transitive) To betroth: to promise someone solemnly in marriage: fiancer sa fille à un voisin.[3][10][11]
  2. (reflexive) Se fiancer: to get engaged: Paul et Léa se sont fiancés au printemps.[10][12]
  3. (dated) To celebrate the betrothal of a couple, said of the priest.[2][9]
  4. (figurative, literary) To unite harmoniously.[3][2]

Word family

Usage notes

Littré records the proverb tel fiance qui n'épouse pas, “many a man is engaged who does not marry”.[9]

References

  1. ^ a b c d Wiktionary, the free dictionary, https://en.wiktionary.org
  2. ^ a b c d e f Guilbert, Louis; Lagane, René; Niobey, Georges, eds. (1971–1978; 1989), Grand Larousse de la langue française, Paris: Larousse
  3. ^ a b c d e f g h i j k l m n o 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
  4. ^ a b Anglo-Norman Dictionary (AND2), Aberystwyth University, anglo-norman.net (2nd ed., 2005–)
  5. ^ a b Rey, Alain, ed. (2005), Le Grand Robert de la langue française, electronic version, Paris: Le Robert
  6. ^ a b c d e f Rey, Alain, ed. (1992), Dictionnaire historique de la langue française, Paris: Le Robert
  7. ^ a b c Bloch, Oscar; Wartburg, Walther von (1989), Dictionnaire étymologique de la langue française, 8th ed., Paris: Presses universitaires de France
  8. ^ a b Meyer-Lübke, Wilhelm (1935), Romanisches etymologisches Wörterbuch, 3rd ed., Heidelberg: Winter
  9. ^ a b c d e Littré, Émile (1873–1877), Dictionnaire de la langue française, 4 vols. and supplement, Paris: Hachette
  10. ^ a b Rey-Debove, Josette; Rey, Alain, eds. (2007), Le Petit Robert de la langue française, Paris: Le Robert
  11. ^ Dictionnaire de français Larousse, larousse.fr/dictionnaires/francais (accessed 2024)
  12. ^ Dictionnaire Le Robert en ligne, dictionnaire.lerobert.com (accessed 2024)
Cite this entry

“Fiancer.” Etymologically, 14 Nov. 2026, etymologically.com/fr/fiancer. Accessed 15 Nov. 2026.

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