Synonyms|37Antonyms|1|Broader|0Narrower|0Related|0
1
opaque(adjective, incoherent, unfathomable, incomprehensible, impenetrable)
1
perplexing(adjective, unfathomable, impenetrable, opaque, unintelligible)
1
puzzling(adjective, unfathomable, impenetrable, opaque, unintelligible)
1
sibylline(adjective, unfathomable, impenetrable, unintelligible)
1
unclear(adjective, incoherent, unfathomable, incomprehensible, impenetrable)
1
unfathomable(adjective, incoherent, incomprehensible, impenetrable, unintelligible)
1
ungraspable(adjective, incoherent, unfathomable, incomprehensible, impenetrable)
1
unimaginable(adjective, unfathomable, impenetrable, opaque, unintelligible)
1
unintelligible(adjective, incoherent, unfathomable, incomprehensible, impenetrable)
1
unknowable(adjective, incoherent, unfathomable, incomprehensible, impenetrable)
0
exceptional(singular, uncommon)
0
incogitable(singular, uncommon)
0
indescribable(singular, uncommon)
0
mind-boggling
0
singular
0
uncommon
0
unordinary(singular, uncommon)
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APASmart Define. (2011). not understandable thesaurus. Retrieved September 23, 2026, from https://smartdefine.org/not_understandable/thesaurus/synonyms
ChicagoSmart Define. 2011. "not understandable thesaurus" https://smartdefine.org/not_understandable/thesaurus/synonyms (accessed September 23, 2026).
HarvardSmart Define 2011, not understandable thesaurus, Smart Define, viewed 23 September, 2026, <https://smartdefine.org/not_understandable/thesaurus/synonyms>.
MLASmart Define. "not understandable thesaurus" 24 May 2011. Web. 23 September 2026. <https://smartdefine.org/not_understandable/thesaurus/synonyms>