Dictionary 1. (a.) Not soluble; in capable or difficult of being dissolved, as by a liquid; as, chalk is insoluble in water.2. (a.) Not to be solved or explained; insolvable; as, an insoluble doubt, question, or difficulty. 3. (a.) Strong. Thesaurus coherent cohesive enwrapped in mystery impartible indefinable indiscerptible indissoluble indissolvable indivisible inexplicable inextricable infrangible infusible inseparable insolvable mysterious mystic unaccountable undefinable undividable unexplainable unified uninterpretable unsolvable |