Definitions for unclear
Random House Webster's College Dictionary
poorly stated or described
"he confuses the reader with ill-defined terms and concepts"
not clear to the mind
"the law itself was unclear on that point"; "the reason for their actions is unclear to this day"
indecipherable, unclear, undecipherable, unreadable(adj)
not easily deciphered
Kernerman English Learner's Dictionary
It is unclear whether they will agree to pay.
I'm unclear about who is in charge.
Ambiguous; liable to more than one interpretation.
Not clearly or explicitly defined.
Not easy to see or read; indecipherable or unreadable.