unrepentant

/ˌʌnrɪˈpɛntənt/
adjective
  1. Feeling or showing no regret or remorse for one's actions or beliefs, especially after doing something wrong.
    • She was unrepentant about her harsh words, insisting she had told the truth.
    • Even after being caught, the thief remained unrepentant about stealing the car.
    • The politician was unrepentant for his controversial vote, saying he stood by his principles.
  2. Not changing one's opinion or behavior despite criticism or consequences; stubbornly persistent.
    • Despite the company's losses, the CEO remained unrepentant in his decision to expand overseas.
    • He is an unrepentant fan of old-fashioned rock music, refusing to listen to anything modern.
    • She is an unrepentant optimist, always finding the bright side even in difficult situations.