(1) the underground ::
undergrunden(2) underground station ::
undergrunds Station(3) underground train ::
undergrundstog(4) underground water ::
underjordisk vand(5) underground railway ::
metro(6) by underground ::
med metro(7) go underground ::
gå under jorden(8) underground economy ::
undergrundsøkonomien(9) underground passage ::
underjordisk passage(10) underground river ::
underjordisk flod