Etymologically

Etymology and origin of the French word boulon

Confidence
Established
Formation
Derivation
First attested
1200s More words from the 12th century
Ultimate origin
Latin bulla
Etymology tree
inherited borrowed derived
Latin bulla
French boule
French boulon
Italian bolla
From the same root
French bulletin ← bulla
Latin billa ← bulla
Latin bullescō ← bulla
Latin bulliō ← bulla
Spanish billete ← bulla
French boulot ← boule

Pronunciation

Forms

boulon m (plural boulons)[1] Old and Middle French boullon, bouillon and bullon.[2][3] Anglo-Norman bolyon.[4]

Etymology

It is formed from French boule + -on,[2][1][5][6] first meaning a small round mass.[2][5][7] Its base comes from Latin bulla (“bubble”), which took the sense “ball” in Gallo-Romance.[6] The fastening sense is a narrowing of the first one to fixing pieces with a round head;[2][7] Littré likewise explains the name by the bolt's ball-shaped head.[3] Medieval Latin had bolinus in the sense “small round mass” from 1295.[2]

Earliest recorded meaning

It is first found as boullon in the 13th century, for a small ball,[2][5][8] and in 1360 as bouillon “small round mass” in the inventory of Louis of Anjou.[2]

Semantic evolution

From 1319–1327 the word named a fixing or assembly piece with a round head.[2][7] It also named an ornamental boss: in the Anglo-Norman of 1396–1404,[4] and in a 15th-century inventory of a Bible whose boards carried cinq bullons de cuivre dorés (“five gilt copper bosses”).[3][7] The fixing sense was then extended to any piece screwed onto a rod, whatever its shape, and the link with boule was forgotten.[7] The modern bolt is a threaded rod with a head at one end and a nut at the other.[2][9]

In the 19th century it also named a round iron mould for lead pipes and a part of the weaver's loom.[2][3] In popular speech visser des boulons means working on an assembly line,[9] and the figurative resserrer les boulons, to restore control by firmer organization, is recent.[7][8]

Timeline

  • 13th century – Boullon “small ball” is recorded.[2][5]
  • 1295 – Medieval Latin bolinus “small round mass” appears.[2]
  • 1319–1327 – First used for a fixing or assembly piece.[2][7]
  • 1360 – Bouillon “small round mass” in the inventory of Louis of Anjou.[2]
  • 1396–1404 – Anglo-Norman boulon “ornamental boss”.[4]
  • 1425 – The verb boulonner appears, first meaning “to decorate with bosses”.[6][7]
  • 1842 – The Académie's supplement records the mould and loom senses.[2]
  • 1866 – Boulonnerie and boulonnier are recorded.[2]

Meanings

Noun

  1. A bolt: a threaded metal rod with a head, used with a nut to join pieces of wood or metal.[8][2][9]
  2. Boulon d'ancrage: an anchor bolt fixed in masonry.[8][2]
  3. (bookbinding) A nail used by bookbinders.[2][3]
  4. (obsolete) A round iron mould for making lead pipes, also a part of a weaver's loom.[2][3]
  5. (figurative) Serrer or resserrer les boulons: to take a situation firmly in hand by stricter organization.[8][7]

Word family

  • boulonner
  • boulonnerie
  • boulonnier
  • déboulonner

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 l m n o p q r s t 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 Littré, Émile (1873–1877), Dictionnaire de la langue française, 4 vols. and supplement, Paris: Hachette
  4. ^ a b c Anglo-Norman Dictionary (AND2), Aberystwyth University, anglo-norman.net (2nd ed., 2005–)
  5. ^ a b c d Rey, Alain, ed. (2005), Le Grand Robert de la langue française, electronic version, Paris: Le Robert
  6. ^ a b c Bloch, Oscar; Wartburg, Walther von (1989), Dictionnaire étymologique de la langue française, 8th ed., Paris: Presses universitaires de France
  7. ^ a b c d e f g h i Rey, Alain, ed. (1992), Dictionnaire historique de la langue française, Paris: Le Robert
  8. ^ a b c d e Rey-Debove, Josette; Rey, Alain, eds. (2007), Le Petit Robert de la langue française, Paris: Le Robert
  9. ^ a b c Guilbert, Louis; Lagane, René; Niobey, Georges, eds. (1971–1978; 1989), Grand Larousse de la langue française, Paris: Larousse
Cite this entry

“Boulon.” Etymologically, 14 Nov. 2026, etymologically.com/fr/boulon. Accessed 15 Nov. 2026.

Last edited on . ·