penitent
pen-i-tent
noun
A person who is expressing sorrow and regret for their sins.
"The priest listened to the penitent's confession."
adjective
Feeling or showing deep regret and sorrow for one's wrongdoing.
"She gave a penitent apology for her mistake."
Thesaurus
Synonyms: rueful, penitential, ruthful, penitentiary, remorseful, contrite, repentant
Antonyms: impenitent, unremorseful, unrepentant