The term 'INSOLUBLE' is a scientific term used to describe a substance that cannot be dissolved in a liquid. It is often used to describe substances such as sugar, salt, and other minerals that are unable to dissolve in water. The term 'incapable of being dissolved' is a more general term that can be used to describe any material that is not able to be dissolved in a liquid. In this case, the term 'incapable of being dissolved' is synonymous with 'INSOLUBLE'.