| 1 | Latin | directio | direction; aiming; righteousness |
| 2 | Latin | dirigo | I lay straight; arrange in lines; I direct,... |
| 3 | Latin | rego | I rule, govern; I guide, steer; I oversee, manage |
| 4 | Proto-Italic | regō | — |
| 5 | Proto-Indo-European | h₃réǵeti | to be straightening, to be setting upright |
| 6 | Proto-Indo-European | h₃reǵ- | to straighten, to right oneself; right; just |