Learn how to say Insoluble correctly in English with this tutorial pronunciation video.
Oxford dictionary definition of the word insoluble:
1impossible to solve:
the problem is not insoluble
2(of a substance) incapable of being dissolved:
once dry, the paints become insoluble in water
(also insolubilise) verb
late Middle English: from Old French, or from Latin insolubilis, from in- ‘not’ + solubilis (see soluble)