Wài hé lǐ yìng describes a situation where there is external attack coordinated with internal response, or inner and outer collusion.
外合里应指外部进攻，内部接应，也指内外相互勾结。
| 成语 | 外合里应 |
|---|---|
| 解释 | 外面攻打，里面接应 |
| 出处 | 《前汉书平话》上卷：“高皇大喜，既便来日准备外合里应，拿捉陈豨。” |
| 拼音 | wài hé lǐ yìng |
| 拼音码 | whly |
| 近义词 | 里应外合、内外勾结 |
| 用法 | 联合式；作谓语；指内外勾结 |
| 英语 | act from inside in coordination with attack from outside |
Tags: freq3
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