originates from

PNWGmc *hʷarbijaną "to turn, to change" (hʷarbijaną > hʷarβijan > hwarβijan > hwærβijan > hwærβjan > hwearβjan > hwierβjan > hwierβan > hwierfan) through pnwgmc-to-oe

PGmc *hʷarbjan- "make turn" (hʷarbjan- > hwarβjan > hwærβjan > hwearβjan > hwierβjan > hwierβan > hwierfan) through pgmc-to-oe