mortmain
/ˈmɔːtmeɪn/noun
mass noun
- Law the status of lands or tenements held inalienably by an ecclesiastical or other corporation【律】永久管业; 永久管业的土地（或房屋）。
词源
late Middle English: from Anglo-Norman French， Old French mortemain, from medieval Latin mortua manus'dead hand' (probably alluding to impersonal ownership).