adjective / noun
confessional
kun-FESH-uh-nul/kʌnfˈɛʃʌnʌl/
Concerned with revealing private matters or admitting wrongdoing.
The speaker's confessional account reveals private feelings during the intimate recording.

Etymology
The “admit” root underlies an adjective meaning “pertaining to confession.” In the selected sense, that connection emphasizes personal disclosure: revealing private feelings or acknowledging one's own wrongdoing.
In context
everyone said, "You can't write this way. It's too personal. It's confessional. You can't write this, Anne." And everyone was discouraging me.
More examples
- He adopts a confessional tone as he admits his mistakes.
- The conversation turns confessional when we discuss our childhood secrets.
- The priest listens from behind a screen in the confessional.
Forms
confessional · confessionals
confess verb — To admit wrongdoing or reveal something private.
confession noun — An admission of wrongdoing or private feelings.