1
impenetrable
1
incomprehensible
1
indecipherable
1
mysterious
1
obscure
1
puzzling
1
unclear
1
undecipherable
1
unintelligible
1
unreadable
10 years ago|130 views|share |citing 
APASmart Define. (2016). illegible thesaurus. Retrieved September 25, 2026, from https://smartdefine.org/illegible/thesaurus/narrower
ChicagoSmart Define. 2016. "illegible thesaurus" https://smartdefine.org/illegible/thesaurus/narrower (accessed September 25, 2026).
HarvardSmart Define 2016, illegible thesaurus, Smart Define, viewed 25 September, 2026, <https://smartdefine.org/illegible/thesaurus/narrower>.
MLASmart Define. "illegible thesaurus" 10 March 2016. Web. 25 September 2026. <https://smartdefine.org/illegible/thesaurus/narrower>