(1) the underground ::
neðanjarðar(2) underground station ::
neðanjarðar stöð(3) underground train ::
neðanjarðar lest(4) underground water ::
neðanjarðar vatn(5) underground railway ::
neðanjarðar járnbraut(6) by underground ::
með neðanjarðar(7) go underground ::
fara neðanjarðar(8) underground economy ::
neðanjarðar hagkerfið(9) underground passage ::
neðanjarðar leið(10) underground river ::
neðanjarðar ána