70 entries under dark topic. ×

21
incomprehensible(adjective, knowledge, obscure, difficult, solid)
13
obscure(adjective, hard, obscure, rough, difficult)
11
inscrutable(adjective, knowledge, solid, strange)
11
unfathomable(adjective, hard, knowledge, obscure, difficult)
10
impenetrable(adjective, knowledge, obscure, solid)
8
mysterious(adjective, hard, obscure, solid)
7
ambiguous(adjective, obscure, rough, uncertain)
7
inexplicable(adjective, hard, rough, solid)
7
unknowable(adjective, obscure, solid, superior)
6
equivocal(adjective, obscure, rough, difficult)
5
uncomprehensible(adjective, knowledge, obscure, superior)
5
tenebrous(adjective, obscure, rough, difficult)
5
uncertain(adjective, obscure, rough, difficult)
4
indecipherable(adjective, uncertain, deep, mysterious)
3
cryptic(adjective, obscure, difficult, uncertain)
3
dim(adjective, weak, obscure, rough)
3
invisible(obscure, superior, mysterious, supernatural)
3
perplexing(adjective, hard, obscure, rough, difficult)
3
secret(adjective, obscure, superior, uncertain)
3
shadowy(adjective, weak, obscure, rough)
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APASmart Define. (2016). unintelligible thesaurus. Retrieved September 29, 2026, from https://smartdefine.org/unintelligible/thesaurus/synonyms
ChicagoSmart Define. 2016. "unintelligible thesaurus" https://smartdefine.org/unintelligible/thesaurus/synonyms (accessed September 29, 2026).
HarvardSmart Define 2016, unintelligible thesaurus, Smart Define, viewed 29 September, 2026, <https://smartdefine.org/unintelligible/thesaurus/synonyms>.
MLASmart Define. "unintelligible thesaurus" 30 March 2016. Web. 29 September 2026. <https://smartdefine.org/unintelligible/thesaurus/synonyms>