Unrepentant (adjective)

1. Not feeling sorry or remorseful for one's actions.
2. Not regretful or contrite.

Origin:

From the latin word 'inrepentans' meaning 'not feeling regret or remorse'.

Examples:

1. The criminal was unrepentant and showed no remorse for his crimes.
2. She was unrepentant about her decision to leave her job.
3. The politician remained unrepentant despite criticism from the public.
4. The group was unrepentant about their extreme views and beliefs.
5. The soldier was unrepentant about his actions during the war and considered them necessary.