The extent to which something is unintelligible; the difficulty of understanding something.(noun)
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Use "unintelligibleness" in a sentence
"Now this fine subtilty is a consequence of their putting bodies into a body, and so likewise is the unintelligibleness of the manner how one is contained in the other."
"In the more restricted field of society as in a simple problem which leads up to a more complex one of the same order, the unintelligibleness resulting from my conversation with this young woman owing to our having lived in a particular society at an interval of twenty-five years, impressed me with the importance of history and may have strengthened my own sense of it."
"He gave vent to his agony, as he lay prostrate on his pallet, in wails of anguish and vituperative mutterings; uttered in the unintelligibleness of his own language."