This is the 7073rd most frequent Korean word.
정성을
"정성을" refers to "sincerity" or "devotion."
In this sentence, '정성을' refers to the sincere effort or devotion put into preparing the gift.
그는 정성을 다해 선물을 준비했어요.
He prepared the gift with great care.
Here, '정성을' conveys the heartfelt effort and dedication the chef shows in cooking for the guests.
요리사는 손님을 위한 음식을 정성을 담아 만들었습니다.
The chef made the food for the guests with heartfelt sincerity.
In this context, '정성을' emphasizes the importance of putting heartfelt attention and effort into child-rearing.