ˋㄅㄨˋㄌㄧㄤˇㄌㄧˋshìbùliǎnglì

誓不两立
  1. 發誓對方並存形容雙方仇恨不能和解 仇恨大有誓不兩立」。

the two cannot exist together (idiom)​; irreconcilable differences, incompatible standpoints