1) Quality 
• (n.) The quality of being inexplicable or insolvable. • (n.) The quality or state of being insoluble or not dissolvable, as in a fluid.
In·sol`u·bil'i·ty noun [ Latin insolubilitas : confer French insolubilité .] 1. The quality or state of being insoluble or not dissolvable, as in a fluid. 2. The quality of being inexplicable or insolvable. 
[n] - the quality of being insoluble
noun the quality of being insoluble and difficult to dissolve in liquid