1
uncontrite(adjective, hard, tough, harsh, cruel)
1
undeviating(adjective, harsh, cruel, determined, fierce)
1
unflinching(adjective, mean, severe, harsh, cruel)
1
unpitiful
1
unregenerate(adjective, hard, tough, harsh, cruel)
1
unremitting(adjective, hard, tough, harsh, cruel)
1
unremorseful
1
unrepenting(adjective, hard, tough, harsh, cruel)
1
unstoppable(adjective, harsh, cruel, determined, fierce)
1
venomous(adjective, mean, hateful, malicious, spiteful)
1
wanton(adjective, mean, severe, harsh, cruel)
1
wilful(adjective, determined, resolute, uncompromising, unshakeable)
1
willful(adjective, determined, resolute, uncompromising, unshakeable)
1
without mercy
0
authoritarian
0
barbarian
0
causing dejection(expression, idiom)
0
challenging(adjective, demanding, exacting)
0
coldblooded(adjective, hard, unfeeling, heartless, unyielding)
0
coldhearted(adjective, hard, severe, harsh, cruel)
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APASmart Define. (2016). unforgiving thesaurus. Retrieved September 28, 2026, from https://smartdefine.org/unforgiving/thesaurus/synonyms
ChicagoSmart Define. 2016. "unforgiving thesaurus" https://smartdefine.org/unforgiving/thesaurus/synonyms (accessed September 28, 2026).
HarvardSmart Define 2016, unforgiving thesaurus, Smart Define, viewed 28 September, 2026, <https://smartdefine.org/unforgiving/thesaurus/synonyms>.
MLASmart Define. "unforgiving thesaurus" 24 March 2016. Web. 28 September 2026. <https://smartdefine.org/unforgiving/thesaurus/synonyms>