UNMERCIFUL

merciless, unmerciful

(adjective) having or showing no mercy; “the merciless enemy”; “a merciless critic”; “gave him a merciless beating”

Source: WordNet® 3.1

Etymology

Adjective

unmerciful (comparative more unmerciful, superlative most unmerciful)

not showing mercy

Synonyms

• merciless

Antonyms

• merciful

Source: Wiktionary

Un*mer"ci*ful, a.

Definition: Not merciful; indisposed to mercy or grace; cruel; inhuman; merciless; unkind.

– Un*mer"ci*ful*ly, adv.

– Un*mer"ci*ful*ness, n.

Source: Webster’s Unabridged Dictionary 1913 Edition