confessional
A booth or room in a church where a priest hears confessions. The kanji 懺悔 means 'repentance' or 'confession', and 室 means 'room'.
See also: 懺悔
I confessed my sins to the priest in the church confessional.
Compound of 懺悔 (zange, 'confession, repentance') and 室 (shitsu, 'room'). The word 懺悔 is a Buddhist term originally from Sanskrit via Chinese, meaning 'repentance'. The combination 懺悔室 is a modern coinage for the Christian confessional.