Synonyms|578Antonyms|103|Broader|5Narrower|10Related|232
2
resistive(adjective, resist, resistant)
2
rigid(adjective, hard, tough, solid, detached)
2
steeled
2
steeled against(verb, phrasal verb, insensibility)
2
stiff(adjective, set, hard, tough, solid)
2
strong(adjective, tough, sturdy, unaffected, resilient)
2
uncaring
2
unemotional(adjective, indifferent, detached, distant, apathetic)
2
unkind(adjective, bad, cold, aloof, unresponsive)
2
unmovable(adjective, unyielding, unbending, unreceptive)
2
unobtainable
2
unpersuadable
2
unreachable(adjective, inaccessible)
1
abundant(dense, profuse, impenetrable)
1
acid-fast
1
adamant(adjective, disinclined)
1
against
1
arbitrary
1
as cold as charity(adjective, bad, cold, aloof, no feelings)
1
ballproof
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APASmart Define. (2015). impervious thesaurus. Retrieved September 22, 2026, from https://smartdefine.org/impervious/thesaurus/synonyms
ChicagoSmart Define. 2015. "impervious thesaurus" https://smartdefine.org/impervious/thesaurus/synonyms (accessed September 22, 2026).
HarvardSmart Define 2015, impervious thesaurus, Smart Define, viewed 22 September, 2026, <https://smartdefine.org/impervious/thesaurus/synonyms>.
MLASmart Define. "impervious thesaurus" 14 April 2015. Web. 22 September 2026. <https://smartdefine.org/impervious/thesaurus/synonyms>