immure

ɪˈmjʊə
ɪˈmjɔː

verb

enclose or confine (someone) against their will.

her brother was immured in a lunatic asylum

confine,intern,shut up,lock up,incarcerate,imprison,jail,put away,put behind bars,put under lock and key,hold captive,hold prisoner,coop up,mew up,fence in,wall in,close in,detain,keep,hold,trap