
Middle English from Old French reisun (noun), raisoner (verb), from a variant of Latin ratio(n-), from the verb reri ‘consider’—the source also of ratio, ration, etc.
Middle English from Old French reisun (noun), raisoner (verb), from a variant of Latin ratio(n-), from the verb reri ‘consider’—the source also of ratio, ration, etc.
Late Middle English (in the sense ‘having the ability to reason’): from Latin rationalis, from ratio(n-) ‘reckoning, reason’, from rat– ‘reckoned’, from the verb reri—the source also of ratio, rate, reason, etc.