She decided to cloister herself in the monastery, away from the noise of the world.

cloister 来自拉丁语 claustrum（封闭空间），原指修道院中供修士静修的封闭回廊。作为动词时表示"隐居、与世隔绝"，常指在修道院或类似场所过隐居生活。