Origin: 1275–1325;Middle English < Latinculpābilis, equivalent to culpā(re) to hold liable (derivative of culpa blame) + -bilis-ble; replacing Middle Englishcoupable < Middle French < Latin as above
late 13c., coupable, from O.Fr. coupable, from L. culpabilis, from culpa "crime, fault, blame." English and French both restored the first Latin -l- in later Middle Ages.