immure

Short definition from Wiktionary

Verb

1. 1
   To cloister, confine, imprison or hole up: to lock someone up or seclude oneself behind walls.
2. 2
   To put or bury within a wall.
3. 3
   To wall in.
4. 4
   To trap or capture (an impurity); chiefly in the participial adjective immured and gerund or gerundial noun immuring.

Noun

1. 1
   A wall; an enclosure.