剑树刀山

Explanation: Buddhism says punishment of hell. Described as a very cruel punishment. 　　Usage: Joint type; as object, attribute; 　　Source: Puji Song Interpretation "Five monks Deng Hui Yuan irrigation Ocean State": "Say: 'How is the law?' The master said: 'tree ordered by the sword'." 　　Examples: Said: "How is the law?" The master said Puji :"~。"( Song Interpretation "Wu Deng Hui Yuan" Volume XV) Thesaurus:  Trees ordered by the sword, seas of fire and a forest of knifes-an extremely dangerous place which is most difficult to get through, bluff, most dangerous places, Cliff Juebi