yǐ zǐ zhī máo，gōng zǐ zhī dùn
以子之矛，攻子之盾
词语解释
以子之矛，攻子之盾 [yǐ zǐ zhī máo，gōng zǐ zhī dùn]
1 用你自己的矛来刺你自己的盾。比喻用对方的论点来驳斥对方。
英 Turn sb's battery against himself; Fight sb.with his own weapon;
引证解释
1 )与矛者，誉之曰：‘吾楯之坚，莫能陷也。’又誉其矛曰：‘吾矛之利，於物无不陷也。’或曰：‘以子之矛，陷子之楯，何如？’其人弗能应也。”后以“以子之矛，攻子之盾”比喻用对方的言论、方法或缺点来反驳或攻击对方。
国语辞典
以子之矛，攻子之盾 【yǐ zǐ zhī máo，gōng zǐ zhī dùn】
1 比喻以对方的观点、理论来反驳对方。
引 语本《韩非子·难一》：「楚人有鬻楯与矛者，誉之曰：『吾楯之坚，物莫能陷也。』又誉其矛曰：『吾矛之利，于物无不陷也。』或曰：『以子之矛，陷子之楯何如？其人弗能应也。』」
英语 lit. use sb's spear to attack his shield (idiom, derived from Han Feizi 韓非子|韩非子); turning a weapon against its owner, fig. to attack an opponent using his own devices, hoist with his own petard