noun
a state of being obscured or darkened
verb
to darken or obscure something
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The dense fog began to obnubilate the view of the city skyline.
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I couldn't see anything clearly because the smoke obnubilated my vision.
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The rumors circulating around have obnubilated the truth of the situation.
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His emotions were so overwhelming that they seemed to obnubilate his rational thinking.