十八重地獄
Từ Điển Thuật Ngữ Phật Học Hán Ngữ
The eighteen layers of hells, which are described by one writer as the conditions in which the six sense organs, their six objects, and the six perceptions do not harmonize. Another says the eighteen are the hell of knives, the boiling sands, the boiling excrement, the fiery carriage, the boiling cauldron, the iron bed, etc.