Etymologically

Etymology and origin of the French word fondement

Confidence
Established
Formation
Borrowing
First attested
1119 Philippe de Thaon, Comput More words from the 12th century
Borrowed from
Latin fundamentum
Ultimate origin
Latin fundāmentum
Etymology tree
inherited borrowed derived
Latin fundus
French fond
English fund
Romanian fond
Italian fondo
Romanian fund
Spanish fondo
Latin fundō
French fondre
Italian fondare
Italian fondere
Old French funder
English found
Spanish hundir
French fonder
Latin fundāmentum
English fundament
French fondement
Spanish fundamento
From the same root
Latin funditus ← fundus
Latin lātifundium ← fundus
Latin profundus ← fundus
French foncer ← fond
French plafond ← fond
Italian affondare ← fondo
Romanian înfunda ← fund
French fonderie ← fundō
Latin circumfundō ← fundō
Latin cōnfundō ← fundō
Latin diffundō ← fundō
Latin effundō ← fundō
Latin fundātiō ← fundō
Latin fundātor ← fundō
Latin fundātus ← fundō
Latin infundō ← fundō
Latin offundō ← fundō
Latin perfundō ← fundō
Latin profundō ← fundō
Latin refundō ← fundō
Latin suffundō ← fundō
Latin superfundō ← fundō
Spanish confundir ← fundō
English unfounded ← funder
English foundry ← found
Latin fundāmentālis ← fundāmentum
English fundamental ← fundament

Pronunciation

  • /fɔ̃d.mɑ̃/[1]

Forms

fondement m (plural fondements)[1] Old French fundement;[2] the Anglo-Norman spellings include fundament and foundement.[3]

Etymology

It is borrowed from Latin fundāmentum (“foundation, base, support”),[2][4][5] a derivative of fundō (“to found”), the source of fonder.[4][6] Bloch and Wartburg note that the word stayed in contact with written Latin;[6] the sense “anus” comes from medical Latin, where the Latin word had it in Late Latin.[4][6][2]

Cognate with Italian fondamento, Old Occitan fondamen, Catalan fonament and Spanish fundamento.[6][7][8]

Earliest recorded meaning

The first record, as fundement in Philippe de Thaon's Comput (1119), has the sense “anus”; the architectural sense follows about 1120 in the Oxford Psalter.[2]

Semantic evolution

In building, fondement named the masonry on which a structure rests (about 1120); this use is now old-fashioned, and fondation has replaced it.[4][2] By extension it came to mean whatever something rests on, from about 1174–1176,[2] and in particular the ground of a body of knowledge or a belief, as in sans fondement “groundless”.[4] The plural les fondements is used metaphorically for the bases of an institution, from about 1265 (Jean de Meun).[4][9]

The sense “buttocks, anus” survives as a rare euphemism, like derrière.[4] The English fundament comes from the Old French word.[10]

Timeline

  • 1119 – Fundement “anus” appears in Philippe de Thaon's Comput.[2]
  • c. 1120 – The Oxford Psalter uses it of the foundation of a building.[2][4]
  • c. 1174–1176 – Guernes de Pont-Sainte-Maxence uses it for the base on which something rests.[2]
  • c. 1265 – Jean de Meun uses it figuratively for the basis of an institution or idea.[9][4]
  • 1580 – Montaigne uses the word in another figurative sense.[9]

Meanings

Noun

  1. (dated, usually plural) The foundations of a building, the masonry on which it stands.[11][2]
  2. (figurative, usually plural) The basis on which an institution, a state or a doctrine rests: jeter les fondements d'une république.[11][2]
  3. (usually singular) The ground that justifies a belief or a claim: sans fondement “unfounded”.[11][4]
  4. (euphemistic) The anus or the buttocks.[4][1]

References

  1. ^ a b c Wiktionary, the free dictionary, https://en.wiktionary.org
  2. ^ 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
  3. ^ Anglo-Norman Dictionary (AND2), Aberystwyth University, anglo-norman.net (2nd ed., 2005–)
  4. ^ a b c d e f g h i j k Rey, Alain, ed. (1992), Dictionnaire historique de la langue française, Paris: Le Robert
  5. ^ Wartburg, Walther von, et al. (1922–2002), Französisches Etymologisches Wörterbuch, 25 vols., Bonn / Leipzig / Basel: Klopp / Teubner / Zbinden, p. 3, 862b
  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. ^ 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. ^ a b c Guilbert, Louis; Lagane, René; Niobey, Georges, eds. (1971–1978; 1989), Grand Larousse de la langue française, Paris: Larousse
  10. ^ Harper, Douglas. Online Etymology Dictionary, https://www.etymonline.com
  11. ^ a b c Rey-Debove, Josette; Rey, Alain, eds. (2007), Le Petit Robert de la langue française, Paris: Le Robert

Related etymologies

Cite this entry

“Fondement.” Etymologically, 14 Nov. 2026, etymologically.com/fr/fondement. Accessed 15 Nov. 2026.

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