prosperiter
prospĕrĭter, adv., v. prosper fin. B.
prōsperiter, Adv. (prosper) = prospere, Enn. b. Prisc. 15, 13 codd. (Hertz properiter).
prospĕrĭtĕr, c. prospere : Enn. d. Prisc. Gramm. 15, 13.