The term "dis-solvable" refers to something that can be dissolved or broken down into smaller components. Therefore, its antonyms would be terms that refers to something that cannot be broken down or dissolved. Some appropriate antonyms might include phrases such as "permanent", "immutable", "inflexible", "unchangeable", "fixed", or "immutable". These terms are indicative of something that will not dissolve or disintegrate over time or under certain conditions. For instance, a diamond is permanent, unchangeable and inflexible, while a sugar cube is dissolvable in water. By understanding the antonyms of "dis-solvable", we can use language more effectively and accurately convey the intended meaning.