Etymologically

irrégulier

Etymology and origin of the French word irrégulier

Confidence
Probable
Formation
Borrowing
First attested
1283 Beaumanoir, Coutumes de Beauvaisis More words from the 13th century
Borrowed from
Latin irregularis
Ultimate origin
Latin rēgula
Etymology tree
inherited borrowed derived
Latin regō
Italian reggere
French régir
Latin rēgula
Spanish reja
French règle
German Regel
Italian regola
Romanian regulă
Spanish regla
Latin rēgulāris
English regular
French régulier
French irrégulier
From the same root
Italian correggere ← regō
Latin corrigō ← regō
Latin dīrigō ← regō
Latin ērigō ← regō
Latin expergīscor ← regō
Latin pergō ← regō
Latin porrigō ← regō
Latin rēctor ← regō
Latin rēctus ← regō
Latin regēns ← regō
Latin regentia ← regō
Latin regimen ← regō
Latin regimentum ← regō
Latin regiō ← regō
Latin subrigō ← regō
Latin surgō ← regō
Latin regulator ← rēgula
Latin regulō ← rēgula
Romanian neregulă ← rēgula
French régler ← règle
German regelmäßig ← Regel
French régularité ← rēgulāris
English regularity ← regular
Latin irrēgulāritās ← irrēgulāris

Pronunciation

  • /i.ʁe.ɡy.lje/[1]

Forms

irrégulier (feminine irrégulière, masculine plural irréguliers, feminine plural irrégulières)[1] Old French irreguler (about 1283); irrégulier from the early 14th century.[2][3]

Etymology

It is borrowed from Late Latin irrēgulāris (“not conforming to the rule”), a word of Christian Latin, formed from in- and rēgulāris (“serving as a rule”), from rēgula (“rule”).[4][3][2] The TLFi divides it: the general sense “not following the rules” is treated as a derivative of régulier with the negative prefix, after the Latin word, while the canon-law sense, applied to a cleric who cannot be ordained, is the Latin word borrowed, with its ending replaced by -ier.[5][6]

Cognate with Old Occitan irregular, Spanish irregular and Italian irregolare.[7]

Earliest recorded meaning

Beaumanoir's Coutumes de Beauvaisis (1283) uses irreguler of people who do not keep the rules: those who handed over criminals disguised as clerics seroient irreguler.[5][7]

Semantic evolution

In canon law it was used before 1300 of an abbot unfit for his office.[5] Before 1382 Oresme applied it to things that do not conform to a rule, and in the 14th century it was used in grammar.[5][2] Molière speaks of an irregular procedure in 1659;[5] vie irrégulière “a disorderly life” is recorded in 1671 and an irregular building in 1680.[5] Montaigne (1580) uses it for what is uneven in form, and in 1763 Voltaire writes of troupes irrégulières outside the regular army.[2][5] In the 19th century irréguliers also named native troops serving with the French army in Algeria.[7]

Timeline

  • 1283 – Beaumanoir uses irreguler.[5][4]
  • before 1300 – Used in canon law of an abbot.[5]
  • before 1382 – Oresme applies it to things.[5]
  • 14th century – Oresme's irrégularité is recorded.[4]
  • 1580 – Montaigne uses it of uneven forms.[2]
  • 1659 – Molière writes of an irregular procedure.[5]
  • 1680 – Richelet records bâtiment irrégulier.[5]
  • 1763 – Voltaire writes of troupes irrégulières.[5]

Meanings

Adjective

  1. Irregular in shape, size or arrangement, not symmetrical: une côte irrégulière.[8][5][1]
  2. Uneven in time or rhythm: un pouls irrégulier.[8][7]
  3. Not in keeping with the rules or with common usage; not lawful.[8][1]
  4. Not steady or dependable in conduct or results.[1][2]
  5. (grammar) Not following the usual pattern: un verbe irrégulier.[7][1]
  6. (military) Of troops, not belonging to the regular army.[7][5]
  7. (canon law) Of a cleric, barred from receiving or exercising holy orders.[2][5]

Word family

  • irrégulièrement

References

  1. ^ a b c d e f Wiktionary, the free dictionary, https://en.wiktionary.org
  2. ^ a b c d e f g Guilbert, Louis; Lagane, René; Niobey, Georges, eds. (1971–1978; 1989), Grand Larousse de la langue française, Paris: Larousse
  3. ^ a b Rey, Alain, ed. (2005), Le Grand Robert de la langue française, electronic version, Paris: Le Robert
  4. ^ a b c Bloch, Oscar; Wartburg, Walther von (1989), Dictionnaire étymologique de la langue française, 8th ed., Paris: Presses universitaires de France
  5. ^ a b c d e f g h i j k l m n o p 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. ^ Wartburg, Walther von, et al. (1922–2002), Französisches Etymologisches Wörterbuch, 25 vols., Bonn / Leipzig / Basel: Klopp / Teubner / Zbinden, p. 10, 225a
  7. ^ a b c d e f Littré, Émile (1873–1877), Dictionnaire de la langue française, 4 vols. and supplement, Paris: Hachette
  8. ^ a b c Rey-Debove, Josette; Rey, Alain, eds. (2007), Le Petit Robert de la langue française, Paris: Le Robert

Related etymologies

Cite this entry

“Irrégulier.” Etymologically, 15 Nov. 2026, etymologically.com/fr/irr%C3%A9gulier. Accessed 15 Nov. 2026.

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