Definition from Wiktionary, the free dictionary
From Proto-Germanic *wegaz, whence also Old English weġ (English way), Old Saxon weg (Low German Weg), Old Dutch weg (Dutch weg), Old High German weg (modern German Weg), Gothic 𐍅𐌹𐌲𐍃 (wigs). Ultimately from Proto-Indo-European *weǵʰ-.
Declension of vegr (strong i-stem, ar-genitive)
Declension of vegr (strong i-stem, s-genitive)