unmerciful
- adjective (adj)
Meaning: cruel
Synonyms:
bestial
bloodthirsty
brutal
coldhearted
hard
heartless
hurtful
implacable
inhumane
merciless
monstrous
pitiless
relentless
remorseless
ruthless
tyrannous
uncaring
unfeeling
unpitying
unrelenting
unsparing
vengeful
vindictive
Roget's 21st Century Thesaurus, Third Edition Copyright © 2013 by the Philip Lief Group.