immuring

/IH0 M ER0 IH0 NG/
verb
  1. 1

    To cloister, confine, imprison: to lock up behind walls.

  2. 2

    To put or bury within a wall.

    โ€œJohn's body was immured Thursday in the mausoleum.โ€

  3. 3

    (of a growing crystal) To trap or capture (an impurity); chiefly in the participial adjective immured and gerund or gerundial noun immuring.

noun
  1. 1

    The act of walling up.

Source: https://en.wiktionary.org/wiki/immure, https://en.wiktionary.org/wiki/immuring