English version

mortal enemy/foe

From Longman Dictionary of Contemporary Englishmortal enemy/foemortal enemy/foeENEMYan enemy that you hate very much and will always hate He glared at Claudia as if she were his mortal enemy. mortal
Examples from the Corpus
mortal enemy/foeWell, it might be a big one with a misleading number-plate which simply doesn't stop that gets your mortal enemy.It was also the mortal enemy of horses and would rip them apart in seconds with its mighty talons.I remembered doing this sort of stuff in sixth grade with my mortal enemy, Tommy Jancko.
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