When it comes to the lack of remorse, there are several synonyms that convey a similar sentiment. One such synonym is "unrepentant", which describes a person who shows no regret or guilt for their actions. Similarly, "unapologetic" emphasizes the absence of any apology or remorse. Another synonym worth considering is "callous", which suggests a complete disregard for the feelings or suffering of others, demonstrating a cold and unfeeling nature. "Heartless" also captures this lack of remorse, illustrating a person who is devoid of compassion or empathy. Ultimately, these synonyms help to paint a picture of individuals who are indifferent to the consequences of their actions and show no remorse for their behavior.