1. The quality of being insoluble and difficult to dissolve in liquid
   "The insolubility of oil in water is the basis for many cooking techniques"
    
2. The property (of a problem or difficulty) that makes it impossible to solve
   "The insolubility of certain mathematical problems has been proven";
   - unsolvability

Derived forms: insolubilities

Type of: property, quality

Antonym: solubility

Encyclopedia: Insolubility