Synonyms for unmerciful

Adjective

1. merciless (vs. merciful), unmerciful, cutthroat, fierce, bowelless, mortal(prenominal), pitiless, remorseless, ruthless, unpitying, tigerish, bloody, hard, inclement, implacable, uncompassionate, unkind

usage: having or showing no mercy; "the merciless enemy"; "a merciless critic"; "gave him a merciless beating"