Etymologically

Etymology and origin of the French word hydrater

Confidence
Established
Formation
Derivation
First attested
1805 Encyclopédie méthodique More words from the 19th century
Ultimate origin
Ancient Greek ὕδωρ
Etymology tree
inherited borrowed derived
French hydrate
English hydrate
French hydrater
From the same root
English carbohydrate ← hydrate
English hydration ← hydrate

Pronunciation

Forms

hydrater[1]

Etymology

It is from French hydrate + -er.[2][3][1] The noun hydrate, first spelled ⟨hidrate⟩ in 1802, is a learned formation on Ancient Greek ὕδωρ (húdōr, “water”) with the suffix -ate.[2][1]

Earliest recorded meaning

It is first found as the past participle hydraté “combined with water” in 1805, in the Encyclopédie méthodique.[2][3]

Semantic evolution

The verb began as a term of chemistry: the reflexive s'hydrater “to pass into the state of a hydrate” is dated 1836 by the Grand Robert and the GLLF (Landais) and 1845–46 by the TLFi;[3][4][2][5] Littré records only this reflexive use.[3][4][2][5] The transitive sense “to combine with water” is dated by the TLFi from a botany manual of 1931.[2]

In the 20th century it was extended to bringing water into living tissue, especially the skin, the sense of everyday cosmetic use.[4][6] The adjective hydratable is recorded from 1846.[6]

Timeline

  • 1805 – The participle hydraté appears in the Encyclopédie méthodique.[2]
  • 1836 – Landais records the verb, transitive and reflexive.[4][3]
  • 1845–46 – Bescherelle's supplement records s'hydrater.[2]
  • 1846 – Hydratable is recorded.[6]
  • 1931 – Transitive hydrater “combine with water” in Plantefol's botany.[2]
  • 20th century – The sense “bring water into the tissues, the skin” appears.[4]

Meanings

Verb

  1. (chemistry) To combine with water;[2][6][4] s'hydrater, to become a hydrate.[2][6][4]
  2. To bring or fix water in the body or its tissues, especially to moisturize the skin: cette crème hydrate les peaux sèches.[4][6]

Word family

  • hydratable

References

  1. ^ a b c d 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 Rey, Alain, ed. (2005), Le Grand Robert de la langue française, electronic version, Paris: Le Robert
  4. ^ 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
  5. ^ a b Littré, Émile (1873–1877), Dictionnaire de la langue française, 4 vols. and supplement, Paris: Hachette
  6. ^ a b c d e f Rey-Debove, Josette; Rey, Alain, eds. (2007), Le Petit Robert de la langue française, Paris: Le Robert
Cite this entry

“Hydrater.” Etymologically, 15 Nov. 2026, etymologically.com/fr/hydrater. Accessed 15 Nov. 2026.

Last edited on . ·