inalienable(incapable of being alienated, surrendered, or transferred to another; not alienable) adjective [UK: ˌɪn.ˈeɪ.lɪə.nəb.l̩] [US: ˌɪ.ˈneɪ.ljə.nəb.l̩]
nezcizitelný pozemek noun {m}
mortmain(inalienable possession of lands) noun [UK: ˈmɔːt.meɪn] [US: ˈmɔːrt.ˌmeɪn]