01 a. Not soluble; in capable or difficult of being dissolved, as by a liquid; as, chalk is insoluble in water.
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1.
Not soluble; in capable or difficult of being dissolved, as by a liquid; as, chalk is insoluble in water.
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2.
Not to be solved or explained; insolvable; as, an insoluble doubt, question, or difficulty.
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3.
Strong.[Obs.]