An Etymological Dictionary of the German Language/Schwert
Schwert, n., ‘sword,’ from the equiv. MidHG. and OHG. swërt, n.; a common Teut. term; comp. the equiv. OSax. swerd, Du. zwaard, AS. sweord, E. sword, OIc. sverð. Goth. *swaírda-, n., is wanting, haírus being used. This latter term is the earliest recorded in Teut.; it is preserved in old West Teut., almost exclusively in old compounds, and is connected with Sans. çáru, m., ‘missile, spear.’ The later OTeut. term *swerda- has no correspondences in the non-Teut. languages.