The characteristic or quality of being inexact; a lack of precision, accuracy, or certainty.(noun)
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Use "inexactness" in a sentence
"Words from the heart find their mark, despite their inexactness!"
"In an odd way, the inexactness of the fit made the implied comparison more intriguing."
"And it is unreal to assume, as you seem to, that his current inexactness is sufficiently elastic to cover all eventualities between now and November."