This is the 5123rd most frequent Korean word.
너
"You" (informal, singular).
In this sentence, '너' functions as the subject pronoun, referring to 'you' in a casual, intimate context.
너는 내 친구야.
You are my friend.
Here, '너' is used in its possessive form '너의', meaning 'your', showing ownership in a casual tone.
너의 책은 어디에 있어?
Where is your book?
In this example, '너' operates as the object of the verb '좋아하다', indicating it refers to 'you' as the receiver of the action.