An Etymological Dictionary of the German Language/Beule

by Friedrich Kluge

Beule, f., ‘boil, swelling,’ from the equiv. MidHG. biule, OHG. bûlla, *bûllea, f., ‘blister’; comp. AS. bŷle, E. bile (also boil), Du. buil, ‘boil’; Goth. *bûljô, ‘swelling,’ is connected with Goth. ufbauljan, ‘to inflate,’ and stands probably for *bûgwliô, properly Buckel (hump); akin to biegen.