각골난망
刻骨難忘 · carved in the bone, hard to forget
A kindness you'll never forget.
When to useFormal, heartfelt thanks.
उदाहरण
어려울 때 도와주신 은혜는 각골난망입니다.
I'll never forget how you helped me when times were hard.
च्यानलमा पोस्ट गर्न लग इन गर्नुहोस्
कोरिया जीवन शब्दकोश
शब्द र शिष्टाचारका छोटा गाइड २२