Remorseless

Part of speech: adjective (a.)

Being without remorse; having no pity; hence, destitute of sensibility; cruel; insensible to distress; merciless. "Remorseless adversaries." South. "With remorseless cruelty." Milton.

Synonyms: Unpitying; pitiless; relentless; unrelenting; implacable; merciless; unmerciful; savage; cruel. Re*morse"less*ly, adv. Re*morse"less*ness, n.