Antonyms for Clarity (opposite meaning)
WordNet sense 1 (incomprehensibility as a result of not being clear):
unclearness
WordNet sense 2 (the quality of being unclear or abstruse and hard to understand):
obscurity
WordNet sense 3 (the quality of being opaque to a degree; the degree to which something reduces the passage of light):
opacity
From the ODE community, based on WordNet
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