Prae- | Webster's Dictionary of the English Language

prae
prae, adv., and prep. with abl. [for prai, kindred with Sanscr. prefix pra-, before; Gr. πρό, πρίν, ...

A New Latin Dictionary by Charlton T. Lewis Ph.D. and Charles Short, LL. D.
prae
prae (1) adv.PRO-, before, in front : i prae, sequor, go on before , T. ...

An Elementary Latin Dictionary