Cases of word usage

1) to say one is sorry (for doing wrong or not doing something) (apologize)

2) a statement of being sorry (for doing wrong or not doing something) (apology)

3) to express great approval of, show one is very sorry about, (something) (deplore)

4) not sorry for having done wrong (impenitent)

5) an expression of a positive feeling or affirmative statement by using a negative one, as in 'I shall not be sorry when it's over' (litotes)

6) punishment which one imposes on oneself to show one is sorry (penance)

7) the feeling of being sorry or unhappy at the loss of something; a disappointment or a sad event (regret)

8) to be sorry about having done, wish one had not done, (something bad) (repent)

9) unlucky; causing a person to feel sorry or bad (unfortunate)