No matter what, it doesn't justify: 기로서니

A/V + 기로서니 acknowledges the truth of the first clause, but points out that this does not justify the second clause. It is commonly used with 아무리, and can be shortened to 기로:

아우리 바쁘기로서니 결혼기념일을 잊어버리면 어떻게 해요?

No matter how busy you are, how can you forget your wedding anniversary?

아무리 배가 고프기로서니 먼저 먹으면 어떻게 해요?

Regardless of how hungry you are, how can you eat before me?

아무리 피곤하기로서니 숙제를 안 하면 어떻게 해요?

No matter how tired you are, how can you not do your homework?

아무리 일이 많기로서니 잠을 못 자서 되겠어요?

Regardless of how much work you have, you can’t sleep? (You really should!)

아무리 화가 나기로서니 그에게 악의를 품으면 안 돼요.

No matter how angry you are, you shouldn’t hold a grudge against him.

아무리 돈이 많기로서니 다른 사람을 노예처럼 취급하면 안 돼요.

No matter how rich you are, you shouldn’t treat others like slaves.*

너 아무리 배가 고프기로서니 저를 위해 케이크 한 조각도 남겨주지 않았어요?

Regardless of how hungry you were, you couldn’t leave a piece of cake for me?

아무리 일이 힘들기로서니 그냥 포기하면 어떻게 해요?

I admit that it’s difficult, but how can you just give up?

아무리 다이어트를 하기로서니 밥을 굶으면 되겠어요?

I know you’re on a diet, but how can you just starve yourself?

언니하고 싸웠기로서니 서로 눈도 안 마주쳐요?

So now you don’t even look your sister in the eye because you had a fight?  

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