This expression acknowledges the fact stated in the preceding clause but indicates that it cannot be a valid reason or excuse for the excessive situation or action described in the following clause. It is often used with 아무리.
Details
Examples
<span class="speaker-a">가:</span> 소피아 씨, 지난번에 바람맞혀서 미안해요.<br><br><span class="speaker-b">나:</span> 아무리 바쁘<span class='focus'>기로서니</span> 못 나온다고 전화도 못 해요?
A: Sophia, I’m sorry I stood you up last time. B: Couldn’t you at least have made a phone call to let me know you couldn’t come no matter how busy you were?
<span class="speaker-a">가:</span> 그날 회사 일 때문에 정신이 없어서 연락을 못 했어요. 요즘 너무 힘들어서 회사를 그만뒀으면 좋겠다는 생각 마저 들어요.<br><br><span class="speaker-b">나:</span> 회사 일이 좀 힘들<span class='focus'>기로서니</span> 그만둔다는 말을 그렇게 쉽게 하면 안 되지요.
A: I was really stressed out from work that day and wasn’t able to call. It’s so hard these days that I’m even thinking it might be better if I quit my company. B: No matter how hard working at the company may be, you shouldn’t talk about quitting so easily.
<span class="speaker-a">가:</span> 이번에 한 실수로 회사에서 해고될까 봐 걱정돼 죽겠어요.<br><br><span class="speaker-b">나:</span> 실수를 좀 <span class='focus'>했기로서니</span> 그만한 일로 해고를 하겠어요?
A: I’m extremely worried that I will be fired from my company for the mistake I made. B: While you made a mistake, why would you be fired for such a trivial thing?