insoluble

Specifies the liquid in which a substance does not dissolve (e.g., insoluble in water).

Used to state that a substance cannot be dissolved in a liquid.

Indicates a substance is nearly impossible to dissolve.

For all practical purposes, the substance does not dissolve.

Indicates a substance is almost completely insoluble.

Emphasizes that a substance has a very low solubility.

Indicates that a substance has low solubility compared to others.

Used to state that something is insoluble.

Used to suggest that something appears to be insoluble.

Suggests that a problem is very difficult, but not completely impossible to solve.

Based on available information, the problem seems impossible to solve.

Appears to be impossible to solve, though this may not be the case.

Indicates that a problem continues to be unsolvable over time.