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5 entries under inflexible topic. ×

1
hang tough(expression, adjective, tough, sharp, sensible)
1
intransigent(steady, fixed, impassive, obstinate)
1
locked in(expression, sharp, fixed, impassive)
1
obdurate(determined, steady, fixed, impassive)
1
uncompromising(steady, fixed, impassive, obstinate)
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APASmart Define. (2011). tough nut thesaurus. Retrieved October 1, 2026, from https://smartdefine.org/tough_nut/thesaurus/synonyms
ChicagoSmart Define. 2011. "tough nut thesaurus" https://smartdefine.org/tough_nut/thesaurus/synonyms (accessed October 1, 2026).
HarvardSmart Define 2011, tough nut thesaurus, Smart Define, viewed 1 October, 2026, <https://smartdefine.org/tough_nut/thesaurus/synonyms>.
MLASmart Define. "tough nut thesaurus" 23 May 2011. Web. 1 October 2026. <https://smartdefine.org/tough_nut/thesaurus/synonyms>