Etymograph > Indo-European > Old English > Dictionary

fēorþa

fourth

Source: Kroonen 2013:139
originates from: PGmc *fewurþan- 'fourth' (fewurþan- > feurþan > fēorþan) through pgmc-to-oe
(source: Kroonen 2013:139)
Variations
fēowerða 'fourth'