রং (rông, “color”) + ধনু (dhônu, “bow”)
রংধনু • (rôngdhônu) (objective রংধনু (roṅdhonu) or রংধনুকে (roṅdhonuke), genitive রংধনুর (roṅdhonur), locative রংধনুতে (roṅdhonute))