명복이 · 명복을
happiness in the afterlife (as in 명복을 빌다, 'rest in peace')
Example
삼가 고인의 명복을 빕니다.
May the deceased rest in peace.
Word parts
명 underworld, dark+복 blessing, fortune
Literally 'underworld blessing': good fortune in the next world.
Good to know
Used almost only with 빌다 'to pray'. It is the standard condolence in speech, cards, texts and online comments.
Related words