| unclear(adjective, unintelligible, unreadable) | |
| unreadable(adjective, incoherent, incomprehensible, unintelligible, inarticulate) | |
| indecipherable(adjective, small, restricted, incomprehensible, unintelligible) | |
| obscure(adjective, understood, unreadable) | |
| unintelligible(adjective, understandable, unreadable) | |
| indistinct(adjective, vague, incoherent, incomprehensible, unreadable) | |
| crabbed(adjective, unreadable) | |
| mysterious(adjective, unintelligible) | |
| cryptic(adjective, unintelligible) | |
| enigmatic(adjective, unintelligible, unintelligibility) | |
| undecipherable(adjective, unreadable) | |
| faint(adjective, unreadable) | |
| cramped(adjective, restricted, confined, overcrowded, unreadable) | |
| incomprehensible(adjective, incoherent, indecipherable, inarticulate, scrawled) | |
| scrawled(adjective, unreadable, indecipherable) | |
| vague | |
| confused | |
| confusing(adjective, unintelligible) | |
| foggy | |
| foul |
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Illegible on
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| APA | Smart Define. (2016). illegible thesaurus. Retrieved September 20, 2026, from https://smartdefine.org/illegible/thesaurus/synonyms |
| Chicago | Smart Define. 2016. "illegible thesaurus" https://smartdefine.org/illegible/thesaurus/synonyms (accessed September 20, 2026). |
| Harvard | Smart Define 2016, illegible thesaurus, Smart Define, viewed 20 September, 2026, <https://smartdefine.org/illegible/thesaurus/synonyms>. |
| MLA | Smart Define. "illegible thesaurus" 10 March 2016. Web. 20 September 2026. <https://smartdefine.org/illegible/thesaurus/synonyms> |