鏡花水月きょうかすいげつ四字熟語flowers reflected on a mirror and the moon reflected on the water's surfacesomething that is visible but having no substance
羞花閉月しゅうかへいげつ四字熟語the charms of a uniquely beautiful woman(so beautiful that) flowers are abashed and the moon hides
羞月閉花しゅうげつへいか四字熟語the charms of a uniquely beautiful woman(so beautiful that) the moon is abashed and flowers wilt