Old Norse kosta

← Proto-Germanic *kustōną (inherited)

← Proto-Germanic *kustuz (mention)

← Proto-Indo-European *ǵews- (root)

← Old Norse kostr (cognate)

→ Faroese kosta (inherited)

→ Norwegian Bokmål koste (derived)

→ Norwegian Nynorsk kosta (inherited)

→ Old Norse kostnaðr (suffix)

→ Swedish kosta (inherited)