insoluble
1. [ adjective ] (of a substance) not easily dissolved
Related terms: soluble indissoluble
2. [ adjective ] admitting of no solution or explanation
Examples:

"an insoluble doubt"

Related terms: soluble insolvable inexplicable
3. [ adjective ] without hope of solution
Examples:

"an insoluble problem"

Related terms: hopeless
Similar spelling:   insole
  insolvable
  insolent
  insolate
  insolvent
  insolence
  inoculate
  insolvency
  insolently
  innoculate
  include
  inoculum
  included
  insolubility
  inoculant
  insolation
  inoculator
  inclusive
  inoculation
  inoculating