岩いわ牢ろう

noun

cave prison; cliffside jail

Rare term for a prison or jail built into a cave or cliffside, often in historical or fantasy contexts.

• その物もの語がたりでは、反はん逆ぎゃく者しゃは岩いわ牢ろうに閉とじ込こめられた。

  In that story, the rebels were confined in a cave prison.