Etymologically

forteresse

Etymology and origin of the French word forteresse

Confidence
Probable
Formation
Derivation
First attested
c. 1160 Roman d'Enéas More words from the 12th century
Ultimate origin
Latin fortis
Etymology tree
inherited borrowed derived
Latin fortis
French fort
English forte
French forteresse
Italian forte
Spanish fuerte
From the same root
Latin cōnfortō ← fortis
Latin fortia ← fortis
Latin fortificō ← fortis
Latin fortiter ← fortis
Latin fortitūdō ← fortis

Pronunciation

  • /fɔʁ.tə.ʁɛs/[1]

Forms

forteresse f (plural forteresses)[1] Old French forterece, forteresce and fortelece; the spelling forteresse dates from the 14th century.[2][3][4][5] Anglo-Norman also had fortelesce and fortresse.[6]

Etymology

It is formed from French fort + -eresse, from the adjective in the sense “fortified”.[7][8][1][9] Medieval Latin had fortalicia, fortaricia and other variants from 1119.[7] Bloch and Wartburg allow that it may go back to a form Vulgar Latin *fortaricia, beside Old Occitan fortareza and fortaleza;[10] the Grand Robert and the GLLF derive it from that Vulgar Latin form, built on Latin fortis (“strong”).[5][2] Littré explains the forms in ⟨l⟩ and ⟨r⟩ as two forms of the suffix.[3]

Cognate with Catalan fortalesa, Spanish fortaleza and Italian fortezza.[3][4]

Earliest recorded meaning

It is first found in the Roman d'Enéas (about 1160) for a fortified place.[7] The Grand Robert and the GLLF date that text to about 1130.[5][2]

Semantic evolution

From the fortified place, which could defend a town or a whole region, the word passed to a place of safety or a refuge (Calvin, 1541) and to anything that resists from outside.[7][8][11] The romantic period used it for a castle serving as a prison (Mme de Staël, 1810).[7][8] Forteresse volante (about 1943) translates the English flying fortress, the name of an American heavy bomber.[7][8][11]

In the 13th century the noun fort arose beside it in the same sense.[8] English borrowed the Old French word as fortress in the early 14th century.[12]

Timeline

  • c. 1160 – It appears in the Roman d'Enéas.[7]
  • early 14th century – English borrows it as fortress.[12]
  • 14th century – The spelling forteresse replaces forterece.[2]
  • 1541 – Calvin uses it of a refuge.[7][8]
  • before 1559 – Du Bellay uses it of a support or recourse.[13][2]
  • 1810 – Mme de Staël uses it of a castle used as a prison.[7][8]
  • c. 1943 – Forteresse volante is calqued on English.[7][8]

Meanings

Noun

  1. A fortress: a fortified place defending a town or region.[7][11]
  2. A fort or citadel used as a state prison.[11][2]
  3. (figurative) Something that resists attack or influence from outside: une forteresse d'habitudes.[11]
  4. Forteresse volante: a heavy bomber of the United States in the Second World War.[11][7]

References

  1. ^ a b c 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 Littré, Émile (1873–1877), Dictionnaire de la langue française, 4 vols. and supplement, Paris: Hachette
  4. ^ a b Meyer-Lübke, Wilhelm (1935), Romanisches etymologisches Wörterbuch, 3rd ed., Heidelberg: Winter
  5. ^ a b c Rey, Alain, ed. (2005), Le Grand Robert de la langue française, electronic version, Paris: Le Robert
  6. ^ Anglo-Norman Dictionary (AND2), Aberystwyth University, anglo-norman.net (2nd ed., 2005–)
  7. ^ a b c d e f g h i j k l 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
  8. ^ a b c d e f g h Rey, Alain, ed. (1992), Dictionnaire historique de la langue française, Paris: Le Robert
  9. ^ Wartburg, Walther von, et al. (1922–2002), Französisches Etymologisches Wörterbuch, 25 vols., Bonn / Leipzig / Basel: Klopp / Teubner / Zbinden, p. 3, 733a
  10. ^ Bloch, Oscar; Wartburg, Walther von (1989), Dictionnaire étymologique de la langue française, 8th ed., Paris: Presses universitaires de France
  11. ^ a b c d e f Rey-Debove, Josette; Rey, Alain, eds. (2007), Le Petit Robert de la langue française, Paris: Le Robert
  12. ^ a b Harper, Douglas. Online Etymology Dictionary, https://www.etymonline.com
  13. ^ Quemada, Bernard, ed. (1959–2006), Datations et documents lexicographiques (Base historique du vocabulaire français, BHVF), Paris: Klincksieck / CNRS / Champion; ATILF
Cite this entry

“Forteresse.” Etymologically, 11 Nov. 2026, etymologically.com/fr/forteresse. Accessed 12 Nov. 2026.

Last edited on . ·