French word prouver comes from Proto-Indo-European *pr̥-, Proto-Indo-European *bhu-, and later Old French prover (To prove.)
| Dictionary entry | Language | Definition |
|---|---|---|
| *pr̥- | Proto-Indo-European (ine-pro) | |
| *bhu- | Proto-Indo-European (ine-pro) | |
| *pro-bhwo- | Proto-Indo-European (ine-pro) | |
| probus | Latin (lat) | (morally) upright, honest, virtuous. Good, serviceable, excellent, superior, able. |
| probo | Latin (lat) | I acquit, exonerate. I approve, commend. I demonstrate, prove. I test, inspect. |
| prover | Old French (fro) | To prove. |
| prouver | French (fra) | To prove. |