adjective
1.
Synonyms: incomprehensible 1, impenetrable, incognizable, uncomprehensible, unfathomable, ungraspable, unknowable
Antonyms: intelligible
2.
Synonyms: obscure 3, ambiguous, amphibological, equivocal, opaque, tenebrous, uncertain, unclear, unexplicit, vague
Antonyms: intelligible