壁立千仞

Explanation: Described the towering rock. 　　Usage: Supplemental; for adverbial; that steep 　　Source: Jin Zai "jiange Ming": "is said jiange, stand like a wall a thousand yards, the poor to the risk, the very steep road." 　　Examples: Welcome to Wikipedia, tolerance is a virtue. ~, Desire is just. Thesaurus:  cliff bluff