feeling guilty and sorry about something
contrite - sorry
A person who feels remorse or guilt for something bad they have done can be described as ‘contrite’. The word also implies an element of wanting to atone for the misdeed. Unlike an apology, which can be said but not meant, contrition is sincere.
Adam apologized to me but he didn’t seem very contrite, so I doubt he meant it.
She struck a contrite tone in her speech, which helped her to restore a lot of the good-will she had lost.
In an act of contrition, Frank reimbursed me for the damages he caused and offered a full apology.