adjective
1.
Synonyms: pitiless , unmerciful, unpitying
Antonyms: merciful
2.
Synonyms: grim 3, implacable, ironfisted, mortal, relentless, ruthless, unappeasable, unflinching, unrelenting, unyielding
Related Word: compassionless, cutthroat, pitiless; gratuitous, uncalled-for, wanton
Contrasted words: charitable, lenient, tolerant; easy, easygoing
Antonyms: merciful