English bolk

← Old English bealcian (inherited)

← German bölken (cognate)

← English belch (link)

← Middle English bolken (inherited)

← Middle English balken (mention)

← Proto-Germanic *balkōną (inherited)

← Proto-Germanic *belkaną (mention)

← Dutch balken (cognate)

← Dutch bulken (mention)

→ English belch (cognate)

→ English bowk (mention)