undecipherable

From un- + decipherable.

• IPA^(key): /ʌndɪˈsaɪfəɹəbəl/, /ʌndɪˈsaɪfɹəbəl/, /ʌndə-/

undecipherable (comparative more undecipherable, superlative most undecipherable)

1. Not easily deciphered; difficult to read.

• indecipherable
• (not easily deciphered): inexplicable, insolvable, unknowable; See also Thesaurus:incomprehensible
• (difficult to read): indecipherable, unreadable, illegible