solvent (n.) Look up solvent at Dictionary.com
"substance able to dissolve other substances," 1670s, from Latin solventem (see solvent (n.)).
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 "to loosen, release,accomplish, fulfill," from PIE *se-lu-, from reflexive pronoun *s(w)e- (see idiom) + root *leu- "to loosen, divide, cut apart."