WORD ORIGIN

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.

reasonable(ness),  reasonably,  reasoned,  reasoning,  unreasonable(ness),  unreasonably,  unreasoning
Only available upon request
Only available upon request
Only available upon request