expression, godan verb (-ru, irregular)
there are wheels within wheels; there's more than meets the eye
Proverb meaning that behind one hidden aspect there is yet another, deeper layer; things are not as simple as they appear.
彼の話は裏には裏があるようで、何を信じていいかわからない。
His story seems to have hidden depths; I don't know what to believe.
この事件は裏には裏があるから、簡単に判断できない。
This case has many hidden layers, so we can't judge it easily.