阤  
1. Anciently the same as "陀", meaning a hillside.  
   - "故登~者,倍任者也,犹能以登。" (Therefore, those who climb the slope are the ones who can bear the weight, still capable of ascending.)  
   
2. Obstacles or perilous places.  
形容词  
- 陂阤: steep and uneven.  
   - 《史记.卷一一七.司马相如传》: "登陂阤之长阪兮,坌入曾宫之嵯峨。" (Climbing the long slope of steep hills, one tumbles into the steepness of the palace.)  
参见  
- See the entry for "阤靡".  
动词  
- To collapse or be destroyed.  
   - 《汉书.卷六五.东方朔传》: "宗庙崩阤,国家为虚。" (When the ancestral temple collapses, the state becomes void.)  
   - 唐.颜师古.注: "阤,穨也。" (阤 means to crumble.)  
   - 《文选.张衡.西京赋》: "既定且宁,焉知倾阤。" (Having settled peacefully, who knows of the eventual collapse?)