The state or characteristic of being perspicuous; perspicuity.(noun)
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Use "perspicuousness" in a sentence
"You question the symmetry of "ladder", the unusual sensuousness of "maize", the reversed perspicuousness of "proposal" and wonder just what the hell "thorough" is all about."
"His prose style is a rare exemplification of classic severity and perspicuousness."
"In psychology and history, too, although dialectic is soon choked by the cross-currents of nature, it furnishes the little perspicuousness which there is."