勾结

例句：

1. 1. The two companies colluded to fix the prices.
   两家公司串通固定价格。
2. 2. They conspired to steal the company's secrets.
   他们密谋窃取公司的秘密。
3. 3. The government plotted against the opposition party.
   政府密谋反对反对派党。