solvent
adj.
1650s, "able to pay all one owes," from French solvent, from Latin solventem (nominative solvens), present participle of solvere "loosen, dissolve" (see solve).
n.
"substance able to dissolve other substances," 1670s, from Latin solventem (see solvent, n.).
〔李〕[solv;-enta.] a.可溶解的； 有偿付能力的 ←solv,solut (L solvere,solutus)=to loosen 放松