Definition of insoluble adjective from the Oxford Advanced Learner's Dictionary



    BrE BrE//ɪnˈsɒljəbl//
    ; NAmE NAmE//ɪnˈsɑːljəbl//
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  1. 1(especially British English) (usually US English insolvable
    BrE BrE//ɪnˈsɒlvəbl//
    ; NAmE NAmE//ɪnˈsɑːlvəbl//
    (of a problem, mystery, etc.) that cannot be solved or explained The problem seemed insoluble.
  2. 2insoluble (in something) (of a substance) that does not dissolve in a liquid These chemicals are practically insoluble in water.
  3. opposite soluble
    Word Originlate Middle English: from Old French, or from Latin insolubilis, from in- ‘not’ + solubilis, from solvere ‘loosen, unfasten’.
See the Oxford Advanced American Dictionary entry: insoluble