80 entries under harsh topic. ×

2
unflinching(adjective, mean, severe, cruel)
2
rancorous(adjective, mean, cruel, vicious)
2
rigid(adjective, cruel, determined, fierce)
2
severe(adjective, mean, cruel, vicious)
2
vindictive(adjective, mean, cruel, determined)
1
revengeful(adjective, mean, cruel, vicious)
1
barbarous(adjective, mean, severe, cruel)
1
bound(adjective, cruel, determined, fierce)
1
bound and determined(expression, adjective, idiom, cruel)
1
brutal(adjective, mean, cruel, vicious)
1
callous(adjective, mean, severe, cruel)
1
compassionless(adjective, mean, severe, cruel)
1
cutthroat(adjective, mean, severe, cruel)
1
dead set on(expression, adjective, idiom, cruel)
1
determined(adjective, cruel, fierce, persistent)
1
dog-eat-dog(adjective, mean, severe, cruel)
1
ferocious(adjective, mean, cruel, determined)
1
fierce(adjective, mean, severe, cruel)
1
go for broke(expression, adjective, idiom, cruel)
1
gratuitous(adjective, mean, severe, cruel)
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APASmart Define. (2015). unappeasable thesaurus. Retrieved September 27, 2026, from https://smartdefine.org/unappeasable/thesaurus/synonyms
ChicagoSmart Define. 2015. "unappeasable thesaurus" https://smartdefine.org/unappeasable/thesaurus/synonyms (accessed September 27, 2026).
HarvardSmart Define 2015, unappeasable thesaurus, Smart Define, viewed 27 September, 2026, <https://smartdefine.org/unappeasable/thesaurus/synonyms>.
MLASmart Define. "unappeasable thesaurus" 14 April 2015. Web. 27 September 2026. <https://smartdefine.org/unappeasable/thesaurus/synonyms>