Synonyms for remorseless

modified

1. Lacking remorse as a quality of character

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

   Antonyms sorry*, remorseful, apologetic.

2. Relentless

   implacable, inexorable, unrelenting, unyielding, unforgiving, vindictive, avenging, stern, harsh, exacting, bitter, hard-bitten, sour, grim, adamant, inflexible, perverse, intractable, strict, rigorous, tough, forbidding, crazed; see also severe 1, 2.

   Antonyms yielding, forgiving, indulgent.