地ち下か階かいMeaningsNoun1. basement floor; underground floorKanji used地ground下below階floor (of a building)Composed of地ち下かunderground; below the ground; world of the dead; the grave; underground (activities, movement, etc.); secret; illegal; in hidingNoun階かいstorey; story; floor; stairs; stage (in chronostratigraphy); counter for storeys and floors of a buildingNoun