impenetrability Antonyms

penetrability basic simplicity precision practicability plainness perviousness perspicuity openness membrane sharpness simplicity sureness artless ease straightforwardness obviousness acknowledgement perspicuousness veneer unambiguity transparency lucidness lucidity limpidity clearness clarity certainty candor brightness bluntness authenticity articulateness comprehensibility confidence conviction honesty glassiness explicitness exactness distinctness directness definition definiteness accuracy