unclear
un-clear
adjective
Not easy to understand, see, or hear; vague or indistinct.
"The instructions for the new device were unclear."
Thesaurus
Synonyms: ill-defined, obscure, confusing, vague, amorphous, blurred, puzzling, clouded, perplexing, unreadable, indecipherable, undecipherable
Antonyms: clear, well-defined