Etymologically

certain

Etymology and origin of the French word certain

Confidence
Established
Formation
Inherited
First attested
c. 1160 (certan)
Inherited from
Latin *certanus
Ultimate origin
Latin (cernō)

Pronunciation

  • IPA: /sɛʁ.tɛ̃/[1]
  • IPA: /sɛʁ.tɛ.n‿/[1]

Forms

certain (feminine certaine, masculine plural certains, feminine plural certaines)[1] Old French certan (about 1160), then certain (about 1200).[2][3]

Etymology

It is inherited from Vulgar Latin *certānus, derived from classical Latin certus (“settled, fixed; sure”) (see certes), the past participle used as an adjective of cernō (“to sift; to discern, decide”) (see discerner).[2][4][1] “Certus” itself gave Old French cert, which did not reach the 16th century, supplanted by “certain”.[4][2][5]

Cognate with Old Occitan certan (“sure, sincere”) and old Spanish and Italian “certano”; modern Italian certo and Spanish cierto continue “certus”.[2][4]

Earliest recorded meaning

It is first found as certan about 1160, of a person: “sure, convinced”.[2][3]

Semantic evolution

Of a thing it meant “assured, undeniable” about 1200 and “well established” in 1373.[2] Placed before a noun of person (1283) it expresses a feigned and sometimes scornful ignorance (un certain X), and before any noun an indefinite quality (un certain âge); without an article it is an indefinite adjective close to quelques.[2] The pronoun certains “some people” is found once in 1634 and again from 1863.[2]

Old uses as a noun, “certainty” (1374) and “what is sure” (1567), have nearly gone, except on the stock exchange, where le certain is a fixed rate of exchange (1738).[2] The derivative certainement and the compound incertain (1329) followed.[4]

Timeline

  • c. 1160 – Certan “sure”.[2]
  • c. 1200 – Certain of things.[2]
  • 1283 – Before a person's name.[2]
  • 1329 – Incertain.[4]
  • 1373 – “Well established”.[2]
  • 1863 – The pronoun certains.[2]

Meanings

Adjective

  1. After the noun: certain, sure, beyond doubt: un fait certain.[6][1]
  2. Of a person: sure, convinced: j'en suis certain.[2]
  3. Before the noun: some, a particular: un certain temps, d'un certain âge, un certain M. Dupont.[1][2]

Determiner

  1. Certains, certaines: some, a few: certains jours.[1][2]

Pronoun

  1. Certains: some people: certains pensent que….[2]

Word family

  • certainement
  • incertain
  • certitude
  • certes
  • certifier
  • Latin certus

References

  1. ^ a b c d e f g Wiktionary, the free dictionary, https://en.wiktionary.org
  2. ^ a b c d e f g h i j k l m n o p q r Rey, Alain, ed. (1992), Dictionnaire historique de la langue française, Paris: Le Robert
  3. ^ a b Rey, Alain, ed. (2005), Le Grand Robert de la langue française, electronic version, Paris: Le Robert
  4. ^ a b c d e Bloch, Oscar; Wartburg, Walther von (1989), Dictionnaire étymologique de la langue française, 8th ed., Paris: Presses universitaires de France
  5. ^ Littré, Émile (1873–1877), Dictionnaire de la langue française, 4 vols. and supplement, Paris: Hachette
  6. ^ Rey-Debove, Josette; Rey, Alain, eds. (2007), Le Petit Robert de la langue française, Paris: Le Robert

Related etymologies

Cite this entry

“Certain.” Etymologically, 18 Oct. 2026, etymologically.com/fr/certain. Accessed 18 Oct. 2026.

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