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Definitions of insoluble
  1. adjective
    (of a substance) incapable of being dissolved
    Opposite:
  2. adjective
    admitting of no solution or explanation
    "an insoluble doubt"
    Opposite:
  3. adjective
    without hope of solution
    "an insoluble problem"

    Similar: 

Examples of insoluble
  • "an insoluble doubt"
  • "an insoluble problem"
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