牢ろう役やく人にんろうやくにんMeanings1nounEdo-period jail warden; jailerHistorical term for a jail warden or jailer during the Edo period (1603–1868). Not used in modern contexts.牢ろう役やく人にんは罪ざい人にんを牢ろう屋やに閉とじ込こめる役