Meaning

"ace in the hold"

English-Korean Dictionary

1. 비장의 카드,
2. 따로 떼어 둔(만일의 경우의) 으뜸패

English-English Dictionary

1. Something that is an ace in the hole is an advantage which you have over an opponent or rival, and which you can use if necessary

   Example Sentences

2. Having an ace in the hole can give you an advantage in negotiations or competitions.

   • 비장의 카드가 있으면 협상이나 경쟁에서 우위를 점할 수 있다

Reference

• https://en.dict.naver.com/#/entry/enko/9c406d0bf8a047fcb2bde7168e20ca53
• https://7esl.com/ace-in-the-hole/
• http://www.yes24.com/Product/Goods/5104621