opaque

adj.

[1]	dark , murky , dim , turbid , muddy , cloudy , obscure , obscured , obfuscated , black , impermeable , impenetrable , clouded , non-transparent , untransparent , non-translucent , hazy , blurred , blurry , smoky
[2]	unclear , unintelligible , vague , indefinite , obscure , unfathomable , unplumbable , baffling , mystifying , ambiguous , equivocal , impenetrable , cryptic , enigmatic , puzzling , perplexing , mysterious , elusive , abstruse , arcane , recondite
[3]	unintelligent , dense , thick , dull , obtuse , stupid , dull-witted , stolid , thickheaded , dunderheaded , dunderpated , slow , doltish , backward , cloddish