solvent

A fluid that dissolves a solid, liquid, or gaseous solute, resulting in a solution.

Holonym: solution

Furthermore, this increase in risk is comparable to the risk of death from leukemia after long-term exposure to benzene, another solvent, which has the well-known property of causing this type of cancer.

That which resolves.

It explains. And explanation is the true solvent of mystery.

Able to pay all debts as they become due, and having no more liabilities than assets.

Near-synonyms: above water, in the black

Having the power of dissolving; causing solution.

Surprisingly, this analysis revealed that acute exposure to solvent vapors at concentrations below those associated with long-term effects appears to increase the risk of a fatal automobile accident.