French word jour comes from Proto-Indo-European *dyéw(i), Latin diovos, Latin diu, and later Latin diurnus (Daily. Of the day Day (medieval Latin only).)
| Dictionary entry | Language | Definition |
|---|---|---|
| *dyéw(i) | Proto-Indo-European (ine) | |
| diovos | Latin (lat) | |
| diu | Latin (lat) | Continually, all day. Long enough. Long, long while, for a long time. |
| diem | Latin (lat) | |
| diurnus | Latin (lat) | Daily. Of the day Day (medieval Latin only). |
| diurnum | Latin (lat) | |
| jorn | Old French (fro) | |
| jour | French (fr) | Day. Daylight, light. Opening, aperture. |