(1) the underground ::
지하(2) underground station ::
지하철 역(3) underground train ::
지하철(4) underground water ::
지하수(5) underground railway ::
지하철(6) by underground ::
지하철로(7) go underground ::
지하 이동(8) underground economy ::
지하 경제(9) underground passage ::
지하도(10) underground river ::
지하 강