| 1 | Ecclesiastical Latin | approbatio | the act of approving; approval, approbation,... |
| 2 | Latin | approbo | I regard as good, approve, favor or favour,... |
| 3 | Latin | probo | I approve, I commend; I test, I inspect; I... |
| 4 | Latin | probus | good, serviceable, excellent, superior, able;... |
| 5 | Proto-Indo-European | pro-bhwo- | being in front, prominent |
| 6 | Proto-Indo-European | pro- | toward, forward |
| 7 | Proto-Indo-European | por- | to give birth; forward, through; going, passage |
| 8 | Proto-Indo-European | per- | before, in front; first; to go through |
| 9 | Proto-Indo-European | pr̥tós | passed , crossed |