- Definitions|1
- Thesaurus|933
- Abbreviations|0
| unreadable(adjective, illegible) | |
| indecipherable(adjective, illegible) | |
| incomprehensible(adjective, illegible, unintelligibility) | |
| unclear(adjective, illegible) | |
| impenetrable(adjective, illegible, unintelligibility) | |
| unintelligible(adjective, illegible, unintelligibility) | |
| obscure(adjective, illegible) | |
| illegible(adjective, unreadable) | |
| unfathomable(adjective, unintelligibility) | |
| cryptic(adjective, illegible) | |
| recondite | |
| abstruse | |
| enigmatic | |
| inscrutable(adjective, unintelligibility) | |
| occult | |
| opaque | |
| unaccountable(adjective, unintelligibility) | |
| unknowable(adjective, unintelligibility) | |
| ambiguous | |
| amorphous |
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| APA | Smart Define. (2015). undecipherable thesaurus. Retrieved September 20, 2026, from https://smartdefine.org/undecipherable/thesaurus/synonyms |
| Chicago | Smart Define. 2015. "undecipherable thesaurus" https://smartdefine.org/undecipherable/thesaurus/synonyms (accessed September 20, 2026). |
| Harvard | Smart Define 2015, undecipherable thesaurus, Smart Define, viewed 20 September, 2026, <https://smartdefine.org/undecipherable/thesaurus/synonyms>. |
| MLA | Smart Define. "undecipherable thesaurus" 13 April 2015. Web. 20 September 2026. <https://smartdefine.org/undecipherable/thesaurus/synonyms> |