3
implacable(adjective, cruel, merciless)
2
relentless
2
stubborn
1
adamant
1
grim
1
inexorable
1
stern
1
unappeasable
1
unforgiving
1
unmitigable
1
unrelenting
0
adamantine
0
bitter
0
bullheaded
0
callous
0
clamorous
0
complaining
0
dogged
0
ferocious
0
flaming
11 years ago|498 views|share |citing 
APASmart Define. (2015). placable thesaurus. Retrieved September 20, 2026, from https://smartdefine.org/placable/thesaurus/antonyms
ChicagoSmart Define. 2015. "placable thesaurus" https://smartdefine.org/placable/thesaurus/antonyms (accessed September 20, 2026).
HarvardSmart Define 2015, placable thesaurus, Smart Define, viewed 20 September, 2026, <https://smartdefine.org/placable/thesaurus/antonyms>.
MLASmart Define. "placable thesaurus" 14 April 2015. Web. 20 September 2026. <https://smartdefine.org/placable/thesaurus/antonyms>