adjective / noun
penitent
PEN-ih-tunt/ˈpenɪtənt/
Feeling sorry for wrongdoing, or a person who feels this way.
The penitent adult apologizes while gathering pieces of the broken bowl.

Etymology
The participial form describes someone feeling regret. Penitent applies that feeling specifically to one's own offenses or sins, making it an expression of repentance rather than general sadness.
In context
she's not going to the gallows as a kind of a penitent sinner admitting her guilt. She's actually saying, you guys got it wrong.
More examples
- She writes a penitent letter to the friend she hurt.
- His penitent expression does not erase the harm he caused.
- The penitent asks the priest for forgiveness.
Forms
penitent · penitents
penitence noun — Sorrow or regret for past wrongdoing.
penitently adverb — In a way that shows remorse.