N-COUNT (不受干扰的)私室,密室 If you refer to someone's inner sanctum, you mean a room which is private and sometimes secret, where they can be quiet and alone.
His bedroom's his inner sanctum. 卧室是他的一方净土。
(寺庙、清真寺的)圣所,圣殿 A sanctum is the holiest place inside a holy building such as a temple or mosque.
It gave him a hawkish reputation and by becoming a best seller it earned him money and also entry into many governmental inner sanctums. 这本书使他得到了鹰派的名声。而由于该书获得畅销,他不仅赚了钱,而且使他从此得以出入政府内部的许多机密部门。