1. (n.) The state of being opaque; the quality of a body which renders it impervious to the rays of light; want of transparency; opaqueness.

2. (n.) Obscurity; want of clearness.

abstruseness adiaphanousness ambiguity amorphousness asininity blockishness boobishness boorishness bovinity cloddishness cloudiness crassness crudeness dark darkness denseness density dim-wittedness dimness doltishness dull-wittedness dullardism dullness dumbness duncery equivocation fog fogginess fuzziness grossness hebetude impenetrability impermeability imperviousness to light indefiniteness indeterminateness indistinctness intransparency lethargy loutishness lumpishness mist mistiness mumbo jumbo murk murkiness mystification ninnyism oafdom oafishness obfuscation obscurantism obscuration obscurity obtuseness opaque opaqueness perplexity reconditeness roil roiledness shapelessness simpletonianism slowness sluggishness sottishness stolidity stupidity thick-headedness thick-wittedness thickness turbidity turbidness unclarity unclearness unintelligibility unplainness unteachability vagueness wrongheadedness yokelism