sithionn

venison, Irish sídh, and sídheann (O'R.), Middle Irish sieng, sideng, deer, Welsh hyddgig (= "stag's flesh"), from hydd, stag, red deer: *sedi-, deer; to which is to be referred Middle Irish segh (= agh allaidh, O'Cl.), Early Irish ség (= oss allaidh, Corm.).