láolóng
如獸入牢，鳥入籠也。法苑珠林二十曰：「牢籠真俗，囊括古今。」
Pen, pit, or fold (for animals) and cage (for birds).
cage; trap (e.g. basket, pit or snare for catching animals); fig. bonds (of wrong ideas); shackles (of past misconceptions); to trap; to shackle
上老刀反鄭注周禮牢閡也說文閑養牛馬圈也從冬省凡取四周帀也下祿東反莊子鳩之在籠是也說文從竹龍聲