remorseless synonyms

tough bitter strict grim stern sour rigorous perverse adamant forbidding inflexible intractable exacting inexorable implacable vindictive crazed unyielding unrelenting unforgiving hard-bitten

hard bloody fierce harsh cruel savage ruthless hardened greedy insensitive murderous inhuman intolerant merciless shameless barbarous tyrannical unfeeling obdurate pitiless avaricious unregenerate unchristian indurate sanguinary impenitent