Mid (Old English midd, from the PIE root *medhyo-, also the source of Latin medius and Russian межа) + riff (Old English hrif, from the PIE root *kʷrép-o-, also the source of Latin corpus and Russian круп).
Mid (Old English midd, from the PIE root *medhyo-, also the source of Latin medius and Russian межа) + riff (Old English hrif, from the PIE root *kʷrép-o-, also the source of Latin corpus and Russian круп).