Etymologically

Etymology and origin of the French word onéreux

Confidence
Established
Formation
Borrowing
First attested
1382 before 1382, Oresme More words from the 14th century
Borrowed from
Latin onerosus
Ultimate origin
Latin onus
Etymology tree
inherited borrowed derived
Latin onus
English onus
Latin onerōsus
English onerous
French onéreux
From the same root
Latin onerārius ← onus
Latin onerō ← onus
Latin onustus ← onus

Pronunciation

  • /ɔ.ne.ʁø/[1]

Forms

onéreux (feminine onéreuse, masculine plural onéreux, feminine plural onéreuses)[1] Middle French honereux, honereus, the form used by Oresme.[2][3][4]

Etymology

It is borrowed from Latin onerōsus (“heavy, burdensome”), an adjective of imperial Latin, from onus (“load, burden”).[5][2][6][7] Rey traces the Latin noun to an Indo-European root noun with relatives in Sanskrit and Greek;[2] Littré already compared a Sanskrit word for a cart.[4]

Earliest recorded meaning

It is first found before 1382 in Nicole Oresme, as honereux, meaning burdensome or tiresome: delectation honereuse, ennuyeuse aux bons.[5][4]

Semantic evolution

Until the 16th century the word meant heavy or awkward, and figuratively irksome and hard to bear; that sense has since become dated or literary.[2][5] The sense “costly” seems to have come through law, in à titre onéreux (1611, Cotgrave), said of a thing acquired on condition of a charge or obligation, and inventaire onéreux (1615), an estate with more debts than assets.[2][5] The Académie recorded the sense “that costs a lot of money” in 1694, and this is the main sense today.[5][8]

English onerous (late 14th century) comes from the Old French form and directly from Latin.[9]

Timeline

  • before 1382 – Oresme uses honereux, “burdensome”.[5]
  • 1611 – Cotgrave records à titre onéreux.[5][2]
  • 1615 – Inventaire onéreux appears in the customs of Nieuport.[5]
  • 1694 – The Académie records the sense “costly”.[5][8]
  • 1781 – The adverb onéreusement is recorded.[8]

Meanings

Adjective

  1. Expensive, costly; that involves heavy expenses: un loyer onéreux.[5][8][1]
  2. (dated or literary) Burdensome, troublesome, hard to bear.[5][8]
  3. (law) À titre onéreux: in return for a charge or obligation, as opposed to free of charge.[8][4]

Word family

  • onéreusement

References

  1. ^ a b c Wiktionary, the free dictionary, https://en.wiktionary.org
  2. ^ a b c d e f Rey, Alain, ed. (1992), Dictionnaire historique de la langue française, Paris: Le Robert
  3. ^ Guilbert, Louis; Lagane, René; Niobey, Georges, eds. (1971–1978; 1989), Grand Larousse de la langue française, Paris: Larousse
  4. ^ a b c d Littré, Émile (1873–1877), Dictionnaire de la langue française, 4 vols. and supplement, Paris: Hachette
  5. ^ 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
  6. ^ Bloch, Oscar; Wartburg, Walther von (1989), Dictionnaire étymologique de la langue française, 8th ed., Paris: Presses universitaires de France
  7. ^ Wartburg, Walther von, et al. (1922–2002), Französisches Etymologisches Wörterbuch, 25 vols., Bonn / Leipzig / Basel: Klopp / Teubner / Zbinden, p. 7, 355b
  8. ^ a b c d e f Rey-Debove, Josette; Rey, Alain, eds. (2007), Le Petit Robert de la langue française, Paris: Le Robert
  9. ^ Harper, Douglas. Online Etymology Dictionary, https://www.etymonline.com

Related etymologies

Cite this entry

“Onéreux.” Etymologically, 15 Nov. 2026, etymologically.com/fr/on%C3%A9reux. Accessed 15 Nov. 2026.

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