成语“高屋建瓴”形容居高临下的形势,但是,其中“建”字的含义不容易辨识。“高屋”怎样“建瓴”?辨识“建”字,要先辨识“瓴”字。“瓴”有二义:一为房屋上仰盖的瓦,即瓦沟;二为盛水的容器。“瓴”按第一义解释,则“建”字可解释为设置。“高屋建瓴”就是在高屋之上设置瓦沟,借此比喻居高临下之势似乎也可以说通。《汉语成语小词典》初版时正是这样解释 Idioms “high house built ” to describe the situation of condescending, but the “building ” the meaning of the word is not easy to identify. “High House ” “” building “? Identification ” build “word, you must first identify ” 瓴 “word. ”瓴 “ There are two meanings: one for the house on the cover of the tile, that tile ditch; two for the water container. ”瓴 “ is interpreted as the first meaning, then the word ”build“ can be interpreted as setting. ”High House built 瓴 " is set in the high roof above the ditch, a metaphor of the situation seems to be able to talk about the potential. This is the first time that the Chinese idiom dictionary is explained