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自相矛盾 zì xiāng máodùn
释义
比喻自己说话做事前后抵触
to contradict oneself, to be self-contradictory
出处
《韩非子·难一》：“楚人有鬻（Yù）盾与矛者，誉之曰：‘吾盾之坚，莫之能陷也。’又誉其矛曰：‘吾矛之利，于物无不陷也。’或曰：‘以子之矛陷子之盾，何如？’其人勿能应也。”
近反义词
近义词：漏洞百出
反义词：滴水不漏
例句
一篇文章的观点要前后一致，不能自相矛盾。
典故
楚国有一个卖兵器的人到市场上去卖盾和矛，他先举起盾，向大家夸口说：“我的盾，是世界上最最坚固的，无论多么锋利尖锐的东西也不能刺穿它!”。
接着，他又拿起矛，继续夸着：“我的矛，是世界上最尖利的，无论多么牢固坚实的东西都会被它刺穿!” 。
有人问他：“如果用你的矛去刺你的盾，会怎样呢?”
卖兵器的人张口结舌答不上来了。
该成语用来形容那些言行不一致，前后不协调的人。
In the State of Chu, a man went to the market to sell shields and spears. He first raised his shield and boasted, "My shield is the strongest in the world. No matter how sharp a spear is, it cannot pierce my shield."
Then he held up his spear and continued, "My spear is the sharpest in the world. No matter how strong a shield is, my spear will pierce it."
Someone asked him, "What will happen if you use your spear to pierce your shield?"
The weapon seller was so tongue-tied that he could not utter a single word.
Later, the idiom is used to describe those people who are inconsistent in words and deeds.