Etymologically

soustraction

Etymology and origin of the French word soustraction

Confidence
Established
Formation
Borrowing
First attested
c. 1155 Wace, Roman de Brut More words from the 12th century
Borrowed from
Latin subtractio
Ultimate origin
Latin subtrahō
Etymology tree
inherited borrowed derived
Latin trahō
Italian trarre
Spanish traer
Latin subtrahō
Italian sottrarre
French soustraire
Latin subtractiō
English subtraction
French soustraction
From the same root
Italian tratta ← trahō
Latin abstrahō ← trahō
Latin attrahō ← trahō
Latin contrahō ← trahō
Latin dētrahō ← trahō
Latin distrahō ← trahō
Latin extrahō ← trahō
Latin intertrahō ← trahō
Latin intrahō ← trahō
Latin pertrahō ← trahō
Latin prōtrahō ← trahō
Latin retrahō ← trahō
Latin tractim ← trahō
Latin tractiō ← trahō
Latin tractō ← trahō
Latin tractus ← trahō
Latin trāgula ← trahō
Latin trāma ← trahō
Italian tranne ← trarre

Pronunciation

  • /sus.tʁak.sjɔ̃/[1]

Forms

soustraction f (usually uncountable, plural soustractions)[1] Old French subtractiun (about 1155), later substraction (about 1370), which was used until the middle of the 17th century.[2][3][4] The spelling soustraction appears in 1484.[2][4]

Etymology

It is borrowed from Late Latin subtractiō (“a withdrawing”), which in Boethius is also a mathematical term, a noun from subtrahō (“to withdraw”) (supine subtractum).[2][3][5] The modern form is a reshaping after words with sous-, such as souscrire.[2][3][5] The verb soustraire goes back to the same Latin verb.[4][3]

Littré compares Old Occitan sostraccio, Spanish substraccion and Italian sottrazione.[6]

Earliest recorded meaning

Wace's Roman de Brut, about 1155, has subtractiun for the dropping of a syllable from a word.[2][3]

Semantic evolution

Nicolas Chuquet used soustraction in 1484 for the arithmetical operation of taking one number from another; the GLLF finds an earlier subtration in this sense in a 13th-century treatise on algorisme.[2][5] The general sense “taking away, removal” is found in Oresme about 1370.[3][6] In 1636 Monet records the taking of something by stealth or fraud, and in 1690 Furetière the removal of documents from a lawsuit, the origin of the legal sense.[2][5][3]

Timeline

  • c. 1155 – Wace uses subtractiun in the Roman de Brut.[2]
  • c. 1370 – Oresme writes substraction for taking away.[5][6]
  • 1484 – Nicolas Chuquet's Triparty uses soustraction in arithmetic.[2]
  • 1636 – Monet records the sense “taking by fraud”.[2][5]
  • 1690 – Furetière records it for documents removed from a lawsuit.[2]
  • mid-17th century – The form substraction is last recorded, in Corneille.[2]

Meanings

Noun

  1. (arithmetic) subtraction, the operation of taking one number from another to find the différence: faire une soustraction.[7][6]
  2. (law) The offence of removing a document from a file, or of an official taking documents in their keeping.[7][2]
  3. (dated) The act of taking away or removing something.[7][6]

Usage notes

Its opposite in arithmetic is addition.[7]

References

  1. ^ a b Wiktionary, the free dictionary, https://en.wiktionary.org
  2. ^ a b c d e f g h i j k l m 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 g Rey, Alain, ed. (1992), Dictionnaire historique de la langue française, Paris: Le Robert
  4. ^ a b c Rey, Alain, ed. (2005), Le Grand Robert de la langue française, electronic version, Paris: Le Robert
  5. ^ a b c d e f Guilbert, Louis; Lagane, René; Niobey, Georges, eds. (1971–1978; 1989), Grand Larousse de la langue française, Paris: Larousse
  6. ^ a b c d e Littré, Émile (1873–1877), Dictionnaire de la langue française, 4 vols. and supplement, Paris: Hachette
  7. ^ a b c d Rey-Debove, Josette; Rey, Alain, eds. (2007), Le Petit Robert de la langue française, Paris: Le Robert

Related etymologies

Cite this entry

“Soustraction.” Etymologically, 15 Nov. 2026, etymologically.com/fr/soustraction. Accessed 15 Nov. 2026.

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