529 entries under adjective topic. ×

5
hard-line(strong, hard, tough, severe)
5
impenetrable(set, hard, tough, firm)
5
impervious(hard, tough, solid, rigid)
5
indefatigable
5
invincible
5
iron-willed(determined, resolute, uncompromising, unshakeable)
5
loyal(strong, firm, determined, bold)
5
resisting(unwilling, resistant, undefeated)
5
rock-ribbed(determined, resolute, uncompromising, unshakeable)
5
rugged(strong, hard, sound, tough)
5
standing pat(determined, resolute, obstinate, uncompromising)
5
strong-minded(firm, determined, fixed, resolute)
5
true(strong, tough, flat, firm)
5
uncooperative(mean, hard, tough, harsh)
4
bold
4
concrete(set, hard, tough, firm)
4
courageous
4
decisive
4
exacting(tough, easy, severe, painful)
4
fractious(tough, unpleasant, deliberate, determined)
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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>