Dictionary / Vocabulary / 楼閣
ろうかく
multistoried building; castle; palace; shrine
common word
基礎に杭を打ち込むのを忘れて、空中に楼閣を建てるとは、あなたも愚かな人だ。
It is foolish of you to build a castle in the air while forgetting to drive in pilings for its foundation.