All clear as mud synonyms

adj clear as mud

• sibylline — of, resembling, or characteristic of a sibyl; prophetic; oracular.
• delphic — of or relating to Delphi or its oracle or temple
• greek — of or relating to Greece, the Greeks, or their language.
• fathomless — impossible to measure the depth of; bottomless.
• ungraspable — to seize and hold by or as if by clasping with the fingers or arms.
• unknowable — not knowable; incapable of being known or understood.
• over one's head — the upper part of the body in humans, joined to the trunk by the neck, containing the brain, eyes, ears, nose, and mouth.
• abstruse — You can describe something as abstruse if you find it difficult to understand, especially when you think it could be explained more simply.
• dark — When it is dark, there is not enough light to see properly, for example because it is night.
• deep — If something is deep, it extends a long way down from the ground or from the top surface of something.
• doubtful — of uncertain outcome or result.
• far-out — unconventional; offbeat; avant-garde.
• illegible — not legible; impossible or hard to read or decipher because of poor handwriting, faded print, etc.: This letter is completely illegible.
• illogical — not logical; contrary to or disregardful of the rules of logic; unreasoning: an illogical reply.
• incomprehensible — impossible to understand or comprehend; unintelligible.
• incredible — so extraordinary as to seem impossible: incredible speed.
• indecisive — characterized by indecision, as persons; irresolute; undecided.
• inexplicable — not explicable; incapable of being accounted for or explained.
• insoluble — incapable of being dissolved: insoluble salts.
• intricate — having many interrelated parts or facets; entangled or involved: an intricate maze.
• recondite — dealing with very profound, difficult, or abstruse subject matter: a recondite treatise.
• unaccountable — impossible to account for; unexplained; inexplicable: The boat has an unaccountable tendency to yaw.
• unbelievable — too dubious or improbable to be believed: an unbelievable excuse.
• undefined — without fixed limits; indefinite in form, extent, or application: undefined authority; undefined feelings of sadness.
• heavy — of great weight; hard to lift or carry: a heavy load.
• profound — penetrating or entering deeply into subjects of thought or knowledge; having deep insight or understanding: a profound thinker.
• uncomprehensible — capable of being comprehended or understood; intelligible.