This is the 3843rd most frequent Korean word.
아이에게
"To the child" or "for the child."
Here, '아이에게' indicates the recipient of the action.
나는 아이에게 책을 읽어주었다.
I read a book to the child.
'아이에게' specifies the intended recipient of the gift.
아이에게 줄 선물을 샀다.
I bought a gift to give to the child.
In this sentence, '아이에게' refers to the target towards which the ball is thrown.