French word raisonnable comes from Latin reor (I reckon, calculate.. I think, deem, judge.), Latin reri, Proto-Italic *ratos (Established, authoritative. Fixed, certain.)
| Dictionary entry | Language | Definition |
|---|---|---|
| reor | Latin (lat) | I reckon, calculate.. I think, deem, judge. |
| reri | Latin (lat) | |
| *ratos | Proto-Italic (itc-pro) | Established, authoritative. Fixed, certain. |
| ratus | Latin (lat) | ; rat Established, authoritative. Fixed, certain. |
| rationem | Latin (lat) | |
| rationabilis | Late Latin (LL) | |
| ratiōnābilis | Late Latin (LL) | |
| resnable | Old French (fro) | Wise; intelligent. |
| raisonnable | French (fra) | Possessed of reason. Reasonable, just, fair, consistent, sensible. Resigned. |