af·flu·ent / ˈafloōənt; əˈfloō-/ • adj. 1. (esp. of a group or area) having a great deal of money; wealthy: the affluent societies of the western world | [as pl. n.] (the affluent) only the affluent could afford to travel abroad. 2. archaic (of water) flowing freely or in great quantity.• n. archaic a tributary stream.DERIVATIVES: af·flu·ence n.af·flu·ent·ly adv.

affluent flowing in abundance XV; wealthy XVIII; sb. feeder of a river XIX. — (O)F. — L. affluēns, -ent-, prp. of affluere, f. AF- + fluere flow (see FLUENT).
So affluence XIV.