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5
unbreakable(adjective, tough)
1
unyielding(adjective, unbreakable)
10 years ago|3.8k views|share |citing 
APASmart Define. (2016). infrangible thesaurus. Retrieved September 24, 2026, from https://smartdefine.org/infrangible/thesaurus/synonyms
ChicagoSmart Define. 2016. "infrangible thesaurus" https://smartdefine.org/infrangible/thesaurus/synonyms (accessed September 24, 2026).
HarvardSmart Define 2016, infrangible thesaurus, Smart Define, viewed 24 September, 2026, <https://smartdefine.org/infrangible/thesaurus/synonyms>.
MLASmart Define. "infrangible thesaurus" 10 March 2016. Web. 24 September 2026. <https://smartdefine.org/infrangible/thesaurus/synonyms>