Norwegian Nynorsk bølgje

← English billow (cognate)

← Proto-Germanic *bulgijō (inherited)

← Proto-Indo-European *bʰelǵʰ- (root)

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

← Old Norse bylgja (inherited)

→ Danish bølge (cognate)

→ Norwegian Nynorsk flodbølgje (affix)