This is the 226th most frequent Serbian word.
којем
"Којем" is a dative or locative singular form of the Serbian relative pronoun "који," meaning "to which" or "in which."
The word 'којем' is in the dative case, referring to 'књига' (book) and it complements the verb.
Књига којем сам посветио пажњу је веома занимљива.
The book to which I dedicated my attention is very interesting.
Here, 'којем' is used in correspondence with a masculine noun 'прозор' (window), also in dative.
Прозор којем приступам сваког јутра отвара леп поглед.
The window to which I approach every morning provides a beautiful view.
The term 'којем' complements 'пријатељем' (friend) when referring to the recipient of the action stated by the verb 'рекао' (told).