- unmerciful
- adj1. merciless, pitiless, unpitying, unforgiving, uncompassionate; cruel, heartless, hardhearted, cold-hearted, flinty, stony-hearted, coldblooded; unfeeling, insensitive, unsensitive, indifferent, uncaring, unconcerned, unsympathetic, callous, hardened; hard, harsh, tough, rough, severe, strict, stern; rigid, inflexible, unflexible, nonflexible, unbending, unyielding, not giving an inch; unappeasable, implacable, inexorable, relentless, unrelenting, remorseless, ruthless; inhuman, brutal, brutish, vicious, savage, barbarous.2. excessive, Sl. too much, immoderate, inordinate, extreme; unreasonable, exorbitant, incredible, unbelievable, outrageous, Sl. unreal
A Note on the Style of the synonym finder. 2014.