The quality of being insoluble

That cannot be dissolved. / That cannot be solved; unsolvable; insolvable. / That cannot be explained; mysterious or inexplicable. / That cannot be broken down or dispersed.

Any substance that cannot be dissolved.

In an insoluble manner; irresolubly, irresolvably.

plural of insoluble

The quality or state of being insoluble.

plural of insolubility