bowelless cruel dog-eat-dog flinty griefless hard harsh heartless impenitent inclement inexorable merciless pitiless regretless relentless remorseless ruthless shameless sorrowless unashamed uncompassionate uncompassioned uncontrite unfeeling unforgiving ungrieving unmerciful unpitiful unpitying unregretful unregretting unrepentant unrepining unrueful unsorrowful unsorrowing unsorry unsympathetic unsympathizing unyielding without mercy