prospererrare.|ˈprɒspərə(r)| [f. as prec. + -er1.] a. One who is prosperous or flourishing. b. One who causes prosperity. 1633D. R[ogers]Treat. Sacram. i. 161 A man that is no prosperer in grace.1643Trapp Comm.Gen. xlix. 10 Others render Shiloh..The Peace-maker, The Prosperer.