| 1 | Occitan | drech | right; opposite of left; straight; right |
| 2 | Vulgar Latin | drectus | straight; right; law |
| 3 | Latin | derectus | directed, steered, guided, aligned, pointed,... |
| 4 | Latin | directus | laid straight, arranged in lines, having been... |
| 5 | Latin | dirigo | I lay straight; arrange in lines; I direct,... |
| 6 | Latin | rego | I rule, govern; I guide, steer; I oversee, manage |
| 7 | Proto-Italic | regō | — |
| 8 | Proto-Indo-European | h₃réǵeti | to be straightening, to be setting upright |
| 9 | Proto-Indo-European | h₃reǵ- | to straighten, to right oneself; right; just |