8 entries under illegible topic. ×

10
unreadable
9
indecipherable
8
incomprehensible(adjective, unintelligibility)
8
unclear
7
impenetrable(adjective, unintelligibility)
7
unintelligible(adjective, unintelligibility)
6
obscure
3
cryptic
11 years ago|6.2k views|share |citing 
APASmart Define. (2015). undecipherable thesaurus. Retrieved September 24, 2026, from https://smartdefine.org/undecipherable/thesaurus/synonyms
ChicagoSmart Define. 2015. "undecipherable thesaurus" https://smartdefine.org/undecipherable/thesaurus/synonyms (accessed September 24, 2026).
HarvardSmart Define 2015, undecipherable thesaurus, Smart Define, viewed 24 September, 2026, <https://smartdefine.org/undecipherable/thesaurus/synonyms>.
MLASmart Define. "undecipherable thesaurus" 13 April 2015. Web. 24 September 2026. <https://smartdefine.org/undecipherable/thesaurus/synonyms>