1. Plural of insoluble; substances or materials that cannot be dissolved in a liquid, especially water.
Usage: Often used in chemistry and scientific contexts.
2. Things or problems that cannot be solved or resolved.
Usage: Figurative or abstract use.

Examples

• The insolubles in the mixture were filtered out before analysis.
• Sand and gravel are insolubles that will not dissolve in water.
• The chemist separated the insolubles from the liquid solution.
• Some of the world's greatest insolubles have puzzled philosophers for centuries.
• The experiment involved identifying which compounds were insolubles.