implacable

adj.

（指愤怒、仇恨、敌意等）难和解的；难平息的；仇恨深的；不能改变的

1. Charley is the implacable enemy of mine.
   查里是我的死敌。
2. There is implacable hatred between the two nations.
   两国之间有无法消除的仇恨。
3. They are implacable rivals.
   他们是势不两立的竞争对手。
4. She is implacable an adversary as a wife suing for alimony.
   有如诉讼要求赡养费的妻子一样，她是个难以折衷的对手。

Implacable Force for Family Planning
Saint-Martin ou l'implacable logique touristique
Perry Anderson: el laboratorio implacable de la historia
Implacable images: why epileptiform events continue to be featured in film and television.
The implacable grandeur of the stranger: ruminations on fear and familiarity in Die Vreemdeling
Un gesto implacable guardado en nuestras entrañas: notas reflexivas sobre una encuesta iluminadora
La mort des SDF à Paris : un révélateur social implacable
Scriptural Solution to the Implacable Poverty Widespread in the Current Administration in Nigeria: Comparative Analysis
Media and democracy in Africa : mutual political bedfellows or implacable arch-foes /
Psychodynamics, behavior therapy, and the implacable experimenter: An inquiry into the consistency of personality.