Source : Webster's Revised Unabridged Dictionary (1913)

Prosper \Pros"per\, v. t. [imp. & p. p. {Prospered}; p. pr. &
   vb. n. {Prospering}.] [F. prosp['e]rer v. i., or L.
   prosperare, v. i., or L. prosperare, v. t., fr. prosper or
   prosperus. See {Prosperous}.]
   To favor; to render successful. ``Prosper thou our
   handiwork.'' --Bk. of Common Prayer.

         All things concur toprosper our design.  --Dryden.