Where does “jour” come from?

jour (French) comes from Middle French jour, from Old French jor, from Latin diurnum, from Latin diurnus, from Latin diēs, from Proto-Italic djēm, from Proto-Italic *djous, from Proto-Indo-European dyḗws — to be bright; sky, heaven.

jour (French): day; daylight, light; opening, aperture

Definitions

  1. day; daylight, light; opening, aperture

Ancestry of “jour”, step by step

jour traces back through two separate lines of ancestry.

via Middle French jour

StepLanguageWordMeaning
1Middle Frenchjourdaylight
2Old Frenchjorday
3Latindiurnummasculine accusative singular of diurnus; neuter...
4Latindiurnusof the day; daily; day
5LatindiēsA day, particularly
6Proto-Italicdjēmaccusative singular of *djous
7Proto-Italic*djous
8Proto-Indo-Europeandyḗwssky, heaven; sky god
9Proto-Indo-Europeandyéwssky, heaven
10Proto-Indo-Europeandyew-to be bright; sky, heaven

via Italian giorno

StepLanguageWordMeaning
1Italiangiornoday

Words derived from “jour

Every word from Proto-Indo-European dyew-Every word from Proto-Indo-European dyéwsEvery word from Proto-Indo-European dyḗws