English kerf

← Old English cyrf (inherited)

← German Kerbe (cognate)

← Middle English kerf (inherited)

← Middle English kirf (mention)

← Middle English kyrf (mention)

← Proto-Germanic *kurbiz (inherited)

← Proto-Indo-European *gerbʰ- (derived)

← Saterland Frisian Käärf (cognate)

→ English kerfing (mention)

→ German Kerbe (cognate)