| 1 | Polish | próba | rehearsal; attempt, effort, test, trial, try;... |
| 2 | German | probe | inflection of proben:
## first-person singular... |
| 3 | Latin | proba | test, trial; proof, evidence |
| 4 | Latin | probāre | — |
| 5 | Latin | probō | — |
| 6 | Latin | Probus | — |
| 7 | Proto-Indo-European | pro-bhwo- | being in front, prominent |
| 8 | Proto-Indo-European | pro- | toward, forward |
| 9 | Proto-Indo-European | por- | to give birth; forward, through; going, passage |
| 10 | Proto-Indo-European | per- | before, in front; first; to go through |
| 11 | Proto-Indo-European | pr̥tós | passed , crossed |