170 entries under firm topic. ×

1
cantankerous(tough, difficult, determined, fixed)
1
cemented(adjective, set, hard, solid)
1
changeless(adjective, severe, harsh, solid)
1
chilled(adjective, hard, solid, stiff)
1
consolidated(adjective, set, hard, solid)
1
contracted(adjective, hard, solid, stiff)
1
creaky(adjective, hard, solid, stiff)
1
forceful(adjective, clear, strong, sound, tough)
1
graceless(adjective, hard, solid, stiff)
1
hard as nails(expression, adjective, idiom, strong, hard)
1
immalleable(adjective, hard, solid, resolute)
1
jelled(adjective, hard, tough, solid)
1
mechanical(adjective, hard, solid, stiff)
1
monolithic(adjective, set, solid, hardened)
1
mule(tough, determined, impulsive, stubborn)
1
numbed(adjective, hard, solid, stiff)
1
ornery(adjective, mean, tough, cross)
1
persisting(resolute, persistent, obstinate, stubborn)
1
petrified(adjective, set, hard, solid)
1
purposeful(adjective, deliberate, determined, resolute)
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APASmart Define. (2016). unyielding thesaurus. Retrieved September 29, 2026, from https://smartdefine.org/unyielding/thesaurus/synonyms
ChicagoSmart Define. 2016. "unyielding thesaurus" https://smartdefine.org/unyielding/thesaurus/synonyms (accessed September 29, 2026).
HarvardSmart Define 2016, unyielding thesaurus, Smart Define, viewed 29 September, 2026, <https://smartdefine.org/unyielding/thesaurus/synonyms>.
MLASmart Define. "unyielding thesaurus" 10 March 2016. Web. 29 September 2026. <https://smartdefine.org/unyielding/thesaurus/synonyms>