The story
- Old English · inherited fromgrundweall“foundation”
- Middle English · inherited fromgroundwalle
- English todaygroundwall
From Middle English groundwalle, grundwal, from Old English grundweall (“foundation”), equivalent to ground + wall. Cognate with Middle High German gruntwal (“foundation”), Danish grundvold (“foundation”), Swedish grundval (“base, basis, foundation”).
Etymology from Wiktionary, CC BY-SA 4.0.