Etymologically

Etymology and origin of the French word fossé

Confidence
Established
Formation
Inherited
First attested
c. 1100 Chanson de Roland More words from the 11th century
Inherited from
Latin fossatum via Old French
Ultimate origin
Latin fodiō

Pronunciation

Forms

fossé m (plural fossés)[1] Old French fosset, remade as fossé in the 12th century.[2][3]

Etymology

It is inherited from Old French fosset, inherited from Late Latin fossātum (“ditch”), the noun use of the past participle of fossō (“to dig”), a frequentative of fodiō (“to dig”).[4][2][3] The Robert dictionaries connect it with fossa (“ditch, pit”), the source of fosse.[5][6] The same Latin verb gave fouir.[3]

Cognate with Old Occitan fossat and Italian fossato.[7][8]

Earliest recorded meaning

It is first found about 1100 in the Chanson de Roland, as fosset: E Mahumet enz en un fosset butent “and they throw Mahomet into a ditch”, of the Saracens' idol.[4][8]

Semantic evolution

The word names a long trench dug in the ground to carry off water or to mark off land, and in 1629 one dug for defence round a fortification.[2][3] In Anglo-Norman it covered a wide range: a ditch or moat, a dike, an embankment or hedge, a pit or grave, and even Hadrian's Wall.[9]

Keeping the idea of an obstacle, it came to mean a divergence of views, a gulf between people (1916, Louis Hémon), as in le fossé des générations.[4][2][6] Figurative phrases include sauter le fossé “to make up one's mind at last” (1690)[2][8] and the proverb au bout du fossé, la culbute, recorded by d'Hautel in 1808.[10][3]

Timeline

  • c. 1100 – Fosset appears in the Chanson de Roland.[4]
  • 12th century – The form fossé replaces fosset.[2][3]
  • 1629 – Mairet uses it for a defensive ditch.[3][2]
  • 1690 – Sauter le fossé “to take the plunge” is recorded.[2]
  • 1808 – D'Hautel records au bout du fossé, la culbute.[10]
  • 1916 – Louis Hémon uses it for a divergence of views, in Maria Chapdelaine.[4][2]

Meanings

Noun

  1. A ditch, a long trench dug in the ground for drainage or to separate plots of land: Le camion a fini dans le fossé.[6][4]
  2. (fortification) A moat, a trench surrounding a fortified work;[6][3] fossé antichar, an anti-tank ditch.[6][3]
  3. (geology) A strip of sunken ground bounded by faults, a rift valley: fossé tectonique.[6]
  4. (figurative) A gulf, a divide between people or groups: le fossé des générations.[6][2]

Usage notes

Littré notes the pronunciations /foˈse/ and /fɔˈse/, and that in the 16th century Henri Estienne remarked that the o of fosse was long and that of fossé short.[8]

References

  1. ^ a b c Wiktionary, the free dictionary, https://en.wiktionary.org
  2. ^ a b c d e f g h i j Rey, Alain, ed. (1992), Dictionnaire historique de la langue française, Paris: Le Robert
  3. ^ a b c d e f g h i 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 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. ^ Rey, Alain, ed. (2005), Le Grand Robert de la langue française, electronic version, Paris: Le Robert
  6. ^ a b c d e f g Rey-Debove, Josette; Rey, Alain, eds. (2007), Le Petit Robert de la langue française, Paris: Le Robert
  7. ^ Bloch, Oscar; Wartburg, Walther von (1989), Dictionnaire étymologique de la langue française, 8th ed., Paris: Presses universitaires de France
  8. ^ a b c d Littré, Émile (1873–1877), Dictionnaire de la langue française, 4 vols. and supplement, Paris: Hachette
  9. ^ Anglo-Norman Dictionary (AND2), Aberystwyth University, anglo-norman.net (2nd ed., 2005–)
  10. ^ a b Quemada, Bernard, ed. (1959–2006), Datations et documents lexicographiques (Base historique du vocabulaire français, BHVF), Paris: Klincksieck / CNRS / Champion; ATILF

Related etymologies

Cite this entry

“Fossé.” Etymologically, 11 Nov. 2026, etymologically.com/fr/foss%C3%A9. Accessed 12 Nov. 2026.

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