Etymologically

Etymology and origin of the French word infirme

Confidence
Established
Formation
Borrowing
First attested
1247 More words from the 13th century
Borrowed from
Latin infirmus via Old French
Ultimate origin
Latin īnfirmus
Etymology tree
inherited borrowed derived
Latin fīrmus
French ferme
Romanian fermă
Italian fermo
Latin īnfirmus
English infirm
French infirme
From the same root
Latin firmē ← fīrmus
Latin firmitās ← fīrmus
Latin firmiter ← fīrmus
Latin firmitūdō ← fīrmus
Latin firmō ← fīrmus
Latin īnfirmāria ← īnfirmus
Latin īnfirmitās ← īnfirmus
Latin īnfirmō ← īnfirmus

Pronunciation

  • /ɛ̃.fiʁm/[1]

Forms

infirme (plural infirmes)[1] Old French enferm, enferme and enfer “weak, sick”, in use until the 16th century.[2][3][4]

Etymology

It is inherited from Old French enferm remade after borrowed from Latin īnfirmus (“weak in body or mind”).[2][4][5] The Old French adjective, recorded from about 1050, was the inherited outcome of the same Latin word.[4][2] The learned refashioning was needed because the old form had become identical with some forms of the verb enfermer, according to Gilliéron.[2] In the 16th century Pasquier noted that the French had taken back the Latin ⟨i⟩ in this word and in infirmité.[3][6]

The Latin word is formed from in- (“not”) and firmus (“firm, strong”), the source of ferme1; in modern French the two adjectives are no longer felt to be related.[4][7]

Cognate with Old Occitan enferm, Spanish enfermo and Italian infermo.[6]

Earliest recorded meaning

The old form is found about 1050 in the Vie de saint Alexis: Tut soie anferm, si m' pais pur sue amor (“though I am sick, feed me for the love of God”).[6][7] The form infirme is recorded from 1247 but is rare before the 16th century;[3][8] about 1265 the statutes of the Hôtels-Dieu use it for “sick”.[7][4]

Semantic evolution

In the 16th and 17th centuries the word kept the Latin sense “lacking strength, physical or moral”: Marot speaks of mon cuer jadis infirme (1539).[2][4] It was also said of a weak plant (1690).[4] With Molière (1673) it came to mean subject to infirmities, and it now applies to a person who has lost the use of a limb or organ; it is used as a noun from 1690.[2][7] In this medical sense it differs from both the Old French word and Latin.[3] The weak sense survives only as a literary archaism, as in Pascal's l’esprit est prompt et la chair infirme.[7][8]

Timeline

  • c. 1050 – The old form anferm appears in the Vie de saint Alexis.[6][2]
  • 1247 – The form infirme is first recorded.[3][8]
  • c. 1265 – The statutes of the Hôtels-Dieu use it for “sick”.[7][4]
  • 1539 – Marot uses it for “weak”, of the heart.[2][4]
  • 16th century – Pasquier notes the change from enferme to infirme.[6][3]
  • 1673 – Molière uses it for “subject to infirmities”.[2][7]
  • 1690 – Furetière records it as a noun.[7]

Meanings

Adjective

  1. (archaic) Weak, physically or morally.[2][8]
  2. Disabled, having one or more infirmities, often incurable: rester infirme après une chute.[8][2]

Noun

  1. A disabled person, an invalid.[8][1]

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 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 Bloch, Oscar; Wartburg, Walther von (1989), Dictionnaire étymologique de la langue française, 8th ed., Paris: Presses universitaires de France
  4. ^ a b c d e f g h i Rey, Alain, ed. (1992), Dictionnaire historique de la langue française, Paris: Le Robert
  5. ^ Rey, Alain, ed. (2005), Le Grand Robert de la langue française, electronic version, Paris: Le Robert
  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 e f g h Guilbert, Louis; Lagane, René; Niobey, Georges, eds. (1971–1978; 1989), Grand Larousse de la langue française, Paris: Larousse
  8. ^ a b c d e f Rey-Debove, Josette; Rey, Alain, eds. (2007), Le Petit Robert de la langue française, Paris: Le Robert

Related etymologies

Cite this entry

“Infirme.” Etymologically, 14 Nov. 2026, etymologically.com/fr/infirme. Accessed 15 Nov. 2026.

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