OE bula ON boli ＜ Gmc bulln (Du. bul) ← IE bhel- to swell (L follis🔗⭐🔉

OE bula ON boli ＜ Gmc bulln (Du. bul) ← IE bhel- to swell (L follis a pair of bellows / Gk phalls 'PHALLUS'): cf. bowl^１ bull^２ /b/

研究社新英和大辞典 ページ 176300 での【Du. bul】単語。