1. the quality or state of being unable to be dissolved in a liquid
Usage: technical; chemistry
2. the quality or state of being impossible to solve or resolve
Usage: formal

Examples

• The insolubleness of oil in water makes them separate into distinct layers.
• Scientists studied the insolubleness of the new compound in various solvents.
• The insolubleness of the mathematical problem frustrated even the most experienced researchers.
• The committee acknowledged the insolubleness of the budget crisis without additional funding.
• The insolubleness of certain minerals in acid solutions affects mining processes.
• Philosophers have long debated the insolubleness of certain ethical dilemmas.