را

را

"را" is a Persian preposition that marks the definite direct object of a verb.

The word "را" is used to mark "کتاب" (the book) as a definite direct object in this sentence.

کتاب را می‌خوانم.

I read the book.

The word "را" is used to indicate that "دوستم" (my friend) is the particular direct object that was seen here.

دوستم را دیدم.

I saw my friend.

Here, "را" marks "این غذا" (this food) as the direct object related to the subject's action of liking.

این غذا را دوست دارم.

I like this food.