| 1 | Latin | protervitas | pertness, sauciness, boldness, impudence |
| 2 | Latin | protervus | violent, vehement; reckless, wanton, shameless,... |
| 3 | Latin | protero | I drive forth or away; I trample down, tread on... |
| 4 | Latin | pro- | forward direction, forward movement; action... |
| 5 | Latin | pro | + "ablative"; for; on behalf of, in the interest... |
| 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 |