0
unintelligible(adjective, solid, dense)
0
unknowable(adjective, solid, dense)
0
unmarked
0
unmovable(unyielding, unbending, unreceptive)
0
unmoved(unaffected, unyielding, unbending, resistant, unreceptive)
0
unobtainable
0
unpiercable(adjective, solid, dense)
0
unpierceable(unaffected, unyielding, unbending, resistant, unreceptive)
0
unpierced
0
unreachable(adjective, inaccessible)
0
unrealizable(adjective, impossible)
0
unreceptive(unaffected, unyielding, unbending, resistant)
0
unshakeable
0
untouchable
0
untrod
0
unwavering(unyielding, unbending, unreceptive)
0
unworkable(adjective, impossible)
0
unyielding(strong, resolute, unbending, unreceptive, unconquerable)
0
wayless
0
willful
11 years ago|6.4k views|share |citing 
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>