Origin and history of fro

Old English fram, preposition denoting departure or movement away in time or space, from Proto-Germanic *fra "forward, away from" (source also of Old Saxon, Old High German, Gothic fram "from, away," Old Norse fra "from," fram "forward"), from PIE *pro-mo-, suffixed form of *pro (see pro-), extended form of root *per- (1) "forward." The Germanic sense of "moving away" apparently evolved from the notion of "forward motion." It is related to Old English fram "forward; bold; strong," and fremian "promote, accomplish" (see frame (v.)).

12c., froward, fraward "turned against, perverse, disobedient; peevish, petulant; adverse, difficult," as a preposition, "away from," the Northern form of Old English fromweard (see fromward), with Old Norse fra (see fro) in place of English from. Opposite of toward, it renders Latin pervertus in early translations of the Psalms, and also meant "about to depart, departing," and "doomed to die." Related: Frowardly; frowardness.