myEtymology.com: French etymology of reisun

Etymology of the French word reisun

the Old French word reisun

derived from the Latin word ratio (account, reckoning, invoice)

derived from the Latin word ratus (established, authoritative; fixed; rat)

derived from the Latin word reri (think, regard; deem)

derived from the Proto-Indo-European root *ar-

English reason

Word found in Old French