1
hardheaded(adjective, strong, hard, tough, severe)
1
harsh(adjective, strong, hard, tough, severe)
1
honest(adjective, close, correct, firm, true)
1
honorable(adjective, close, correct, firm, honest)
1
immovable(adjective, set, strong, hard, tough)
1
implacable(adjective, set, strong, hard, tough)
1
implanted
1
impressed
1
imprinted
1
incorrigible
1
incorruptible(adjective, close, correct, firm, honest)
1
inculcated
1
indelible
1
indelibly impressed
1
indomitable(adjective, set, strong, hard, tough)
1
inexhaustible
1
inexorable(adjective, set, strong, hard, tough)
1
inflexible(adjective, set, strong, hard, tough)
1
ingrain
1
ingrown
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APASmart Define. (2016). dyed-in-the-wool thesaurus. Retrieved October 1, 2026, from https://smartdefine.org/dyed-in-the-wool/thesaurus/synonyms
ChicagoSmart Define. 2016. "dyed-in-the-wool thesaurus" https://smartdefine.org/dyed-in-the-wool/thesaurus/synonyms (accessed October 1, 2026).
HarvardSmart Define 2016, dyed-in-the-wool thesaurus, Smart Define, viewed 1 October, 2026, <https://smartdefine.org/dyed-in-the-wool/thesaurus/synonyms>.
MLASmart Define. "dyed-in-the-wool thesaurus" 29 March 2016. Web. 1 October 2026. <https://smartdefine.org/dyed-in-the-wool/thesaurus/synonyms>