froyoudaoicibaDictYouDict[fro 词源字典]
fro: see from
[fro etymology, fro origin, 英语词源]
fro (adv., prep.)youdaoicibaDictYouDict
"away, backwards," c. 1200, Northern English and Scottish dialectal fra, Midlands dialect fro, from Old Norse fra "from," from Proto-Germanic *fra "forward, away from," from PIE *pro- (see pro-). The Norse word is equivalent to Old English fram, thus fro is a doublet of from.