- Definitions|2
- Thesaurus|1k
- Abbreviations|0
| perplexing(adjective, dark, uncertain, mysterious) | |
| profound | |
| ambiguous(adjective, dark, uncertain, mysterious, incoherent) | |
| confusing(adjective, unintelligible) | |
| cramped(adjective, restricted, confined, unintelligible, overcrowded) | |
| hidden(unfathomable, enigmatic, sphinx-like) | |
| inarticulate | |
| recondite(adjective, dark, uncertain, mysterious) | |
| secret(adjective, dark, uncertain, mysterious, unfathomable) | |
| unexplainable(adjective, unfathomable, enigmatic, inexplicable, sphinx-like) | |
| unexplained(adjective, unintelligibility) | |
| unknowable(adjective, deep, incoherent, unfathomable, profound) | |
| abstruse | |
| amorphous | |
| deep | |
| equivocal(dark, uncertain, mysterious, incoherent, incomprehensible) | |
| esoteric | |
| ill-defined | |
| incoherent | |
| inconceivable |
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| APA | Smart Define. (2015). indecipherable thesaurus. Retrieved September 22, 2026, from https://smartdefine.org/indecipherable/thesaurus/synonyms |
| Chicago | Smart Define. 2015. "indecipherable thesaurus" https://smartdefine.org/indecipherable/thesaurus/synonyms (accessed September 22, 2026). |
| Harvard | Smart Define 2015, indecipherable thesaurus, Smart Define, viewed 22 September, 2026, <https://smartdefine.org/indecipherable/thesaurus/synonyms>. |
| MLA | Smart Define. "indecipherable thesaurus" 13 April 2015. Web. 22 September 2026. <https://smartdefine.org/indecipherable/thesaurus/synonyms> |