An Etymological Dictionary of the German Language/fort

by Friedrich Kluge

fort, adv., ‘forwards, continuously, away,’ from MidHG. vort, adv., ‘forwards, further, continuously.’ OHG. *ford is wanting; it would correspond to OSax. forth, AS. forþ, E. forth; Goth. *faúrþ, and its compar. faúrþis, adv., ‘formerly’? Fort, OTeut. forþ, from an earlier frþo, pṛto, is allied to vor. See fürder, fordern, fördern, and vorder.