Etymologically

agir

Etymology and origin of the French word agir

Confidence
Established
Formation
Borrowing
First attested
1459 (legal term)
Borrowed from
Latin ago
Ultimate origin
Latin (agō)
Etymology tree
inherited borrowed derived
Latin ago
French agir
Latin actio
French action
Latin actus
English act
Latin actuosus
Latin actor
English actor
English actress
French acteur
Latin activus
English active
English activist
Latin actrix

Pronunciation

  • IPA: /a.ʒiʁ/[1]

Forms

agir[1]

Etymology

It is borrowed from Latin agō (“to drive; to do, act; to conduct (a case)”).[2][3][4][5][1] “Agō” was first a pastoral word, “to drive (cattle) before one”, and was used in law for conducting a case and in the theatre for playing a part; it belongs to an Indo-European root also seen in Ancient Greek ἄγω (ágō, “to lead”).[2][6] Littré noted that the ending “-ir” suggests an older word than the 16th-century texts show, since “agere” would then have given “ager”.[6] The impersonal il s'agit de“ is a calque of Latin ”agitur de.[3]

Earliest recorded meaning

It is first found in the middle of the 15th century (1450–1459) as a legal term, Rey notes an early use in a Christian context, “to produce, make effective”.[3][2][4]

Semantic evolution

In the 16th century the verb had several senses that died out, including the transitive agir quelque chose and agir de “to speak of, treat of” (1503).[2][3] The modern intransitive “to act, do something” appears in Montaigne but became usual only in the 17th century, with “to behave” and “to have an effect on” (agir sur).[2][3] Il s'agit de “it is a question of” belongs to the same period.[3] agissement dates from 1845 and réagir from the 18th century (Voltaire).[3]

Timeline

  • 1459 – A legal term.[3]
  • 1503 – Agir de “to treat of”.[2]
  • Late 16th century – Intransitive “to act”, in Montaigne.[2]
  • 17th century – The modern senses become usual.[3][7]
  • 18th century – Réagir, in Voltaire.[3]
  • 1845 – Agissements.[3]

Meanings

Verb

  1. To act, do something: il est temps d'agir.[1][7]
  2. To behave: agir en ami, agir selon sa conscience.[1][7]
  3. To have an effect, work: le remède agit, agir sur: to act on.[1]
  4. (law) To take legal action: agir contre quelqu'un.[1][7]
  5. Il s'agit de: it is a matter of, it concerns.[1][3]

Word family

  • agissement
  • réagir
  • agissant

References

  1. ^ a b c d e f g h Wiktionary, the free dictionary, https://en.wiktionary.org
  2. ^ a b c d e f g Rey, Alain, ed. (1992), Dictionnaire historique de la langue française, Paris: Le Robert
  3. ^ a b c d e f g h i j k l Bloch, Oscar; Wartburg, Walther von (1989), Dictionnaire étymologique de la langue française, 8th ed., Paris: Presses universitaires de France
  4. ^ a b Rey, Alain, ed. (2005), Le Grand Robert de la langue française, electronic version, Paris: Le Robert
  5. ^ Wartburg, Walther von, et al. (1922–2002), Französisches Etymologisches Wörterbuch, 25 vols., Bonn / Leipzig / Basel: Klopp / Teubner / Zbinden, p. 24, 257b
  6. ^ a b Littré, Émile (1873–1877), Dictionnaire de la langue française, 4 vols. and supplement, Paris: Hachette
  7. ^ a b c d Guilbert, Louis; Lagane, René; Niobey, Georges, eds. (1971–1978; 1989), Grand Larousse de la langue française, Paris: Larousse

Related etymologies

Cite this entry

“Agir.” Etymologically, 18 Oct. 2026, etymologically.com/fr/agir. Accessed 18 Oct. 2026.

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