solvent (adj.) Look up solvent at Dictionary.com
1650s, "able to pay all one owes," from French solvent, from Latin solventem (nominative solvens), present participle of solvere "loosen, dissolve" (see solve).
solvent (n.) Look up solvent at Dictionary.com
"substance able to dissolve other substances," 1670s, from Latin solventem (see solvent (n.)).