| 1 | English | irreverent | Lacking respect; not having or not showing... |
| 2 | Latin | irreverens | disrespectful, irreverent |
| 3 | Latin | reverens | respecting; respectful, reverent; reverent |
| 4 | Latin | revereor | I stand in awe , regard, respect, honor,... |
| 5 | Latin | rĕ- | — |
| 6 | Latin | prōdūcō | — |
| 7 | Latin | prō- | — |
| 8 | Proto-Italic | *pro- | — |
| 9 | Proto-Indo-European | pro- | toward, forward |
| 10 | Proto-Indo-European | por- | to give birth; forward, through; going, passage |
| 11 | Proto-Indo-European | per- | before, in front; first; to go through |
| 12 | Proto-Indo-European | pr̥tós | passed , crossed |