Old English būc

→ English stomach (mention)

→ English bike (cognate)

→ English trebuchet (cognate)

→ English bouk (inherited)

→ Middle English book (inherited)

→ Middle English buc (inherited)

→ Middle English buk (inherited)

→ Middle English booke (inherited)

→ Middle English bouk (inherited)

→ French trébucher (cognate)

→ French trébuchet (cognate)