←
Old English bula (derived)
←
Old English *bulla (mention)
←
Middle English bule (alter)
←
Middle English bul (alter)
←
Middle English bolle (alter)
←
Middle English boule (alter)
←
Middle English bool (alter)
←
Middle English boole (alter)
←
Middle English bullok (link)
←
Middle English boole (alter)
←
Middle English bol (alter)
←
Proto-Germanic *bulô (inherited)
←
Old Norse boli (derived)
←
Old Norse bolr (borrowed)
→
English bull (inherited)
→
Middle English bullok (affix)