This is the 2499th most frequent Korean word.
딸을
"Daughter" (accusative case).
Here, 딸을 (ttareul) is the object of the verb 사랑합니다 (saranghamnida), indicating that the speaker loves their daughter.
나는 딸을 사랑합니다.
I love my daughter.
In this case, 딸에게 (ttarege) is used to denote the indirect object, but 딸을 could replace it if rearranging the sentence's focus on the daughter receiving the gift.
어머니는 딸에게 선물을 주었습니다.
The mother gave a gift to her daughter.
Here, 딸을 (ttareul) acts as the direct object of the verb 데리고 갔어요 (derigo gasseoyo), showing the action of taking the daughter.