Latin word folia comes from Proto-Indo-European *bʰlē-dʰ-, Proto-Indo-European *rek-, Proto-Indo-European - -tós, and later Proto-Indo-European *h₃réǵeti (To be straightening, to be setting upright.)
| Dictionary entry | Language | Definition |
|---|---|---|
| *bʰlē-dʰ- | Proto-Indo-European (ine) | |
| *rek- | Proto-Indo-European (ine) | |
| - -tós | Proto-Indo-European (ine) | |
| *bʰolh₃yom | Proto-Indo-European (ine) | |
| *h₃réǵeti | Proto-Indo-European (ine) | To be straightening, to be setting upright. |
| *h₃reǵtós | Proto-Indo-European (ine) | Straightened, right, upright. |
| rego | Latin (lat) | I guide, steer. I oversee, manage. I rule, govern. |
| recta | Latin (lat) | |
| folia | Latin (lat) |