19 entries under resistant topic. ×

18
impenetrable(adjective, solid, dense, unaffected, unyielding)
10
inaccessible(adjective, unreasonable, useless, out, absurd)
8
dense(adjective, solid, impervious)
7
impermeable(adjective, solid, dense, unaffected, unyielding)
2
imperviable(unaffected, unyielding, unbending, unreceptive)
2
invulnerable(adjective, strong, resolute, unaffected, unyielding)
2
sealed(adjective, unaffected, unyielding, unbending)
2
tight(unaffected, unyielding, unbending, unreceptive)
1
hermetic(adjective, solid, dense, unaffected, unyielding)
1
impassive(adjective, unaffected, unyielding, unbending)
1
unapproachable(unaffected, unyielding, unbending, unreceptive)
1
watertight(unaffected, unyielding, unbending, impervious)
0
closed to(expression, unaffected, unyielding, unbending)
0
immune(unaffected, unyielding, unbending, unreceptive)
0
solid(adjective, dense, impervious)
0
unaffected(unyielding, unbending, unreceptive)
0
unmoved(unaffected, unyielding, unbending, unreceptive)
0
unpierceable(unaffected, unyielding, unbending, unreceptive)
0
unreceptive(unaffected, unyielding, unbending)
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APASmart Define. (2015). impassable thesaurus. Retrieved September 21, 2026, from https://smartdefine.org/impassable/thesaurus/synonyms
ChicagoSmart Define. 2015. "impassable thesaurus" https://smartdefine.org/impassable/thesaurus/synonyms (accessed September 21, 2026).
HarvardSmart Define 2015, impassable thesaurus, Smart Define, viewed 21 September, 2026, <https://smartdefine.org/impassable/thesaurus/synonyms>.
MLASmart Define. "impassable thesaurus" 14 April 2015. Web. 21 September 2026. <https://smartdefine.org/impassable/thesaurus/synonyms>