- Confidence
- Established
- Formation
- Inherited
- First attested
- c. 1160 (certan)
- Inherited from
- Latin *certanus
- Ultimate origin
- Latin (cernō)
Pronunciation
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
- After the noun: certain, sure, beyond doubt: un fait certain.[6][1]
- Of a person: sure, convinced: j'en suis certain.[2]
- Before the noun: some, a particular: un certain temps, d'un certain âge, un certain M. Dupont.[1][2]
Determiner
Pronoun
- Certains: some people: certains pensent que….[2]
Word family
- certainement
- incertain
Related words
- certitude
- certes
- certifier
- Latin certus
References
- ^ a b c d e f g Wiktionary, the free dictionary, https://en.wiktionary.org
- ^ 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
- ^ a b Rey, Alain, ed. (2005), Le Grand Robert de la langue française, electronic version, Paris: Le Robert
- ^ a b c d e Bloch, Oscar; Wartburg, Walther von (1989), Dictionnaire étymologique de la langue française, 8th ed., Paris: Presses universitaires de France
- ^ Littré, Émile (1873–1877), Dictionnaire de la langue française, 4 vols. and supplement, Paris: Hachette
- ^ 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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