merciless, ruthless, unrelenting, pitiless, unsympathetic, harsh, severe, callous, cold-hearted, unfeeling, hard-hearted, implacable, inexorable, remorseless, unmerciful, unforgiving, stern, cruel, br... [more]
merciless, ruthless, unrelenting, pitiless, unsympathetic, harsh, severe, callous, cold-hearted, unfeeling, hard-hearted, implacable, inexorable, remorseless, unmerciful, unforgiving, stern, cruel, br... [more]