This is the 51st most frequent Serbian word.
којима
The word "којима" in Serbian means "to whom" or "which" (dative/instrumental plural form).
The word "којима" refers to the dative case plural form of "који", relating to "о" (about).
Књиге о којима смо причали су веома занимљиве.
The books we talked about are very interesting.
The word "којима" is used in this sentence in the dative case plural, indicating the indirect object of the verb "писао" (wrote) - "пријатељи" (friends).
Пријатељи којима сам писао су одговорили на моје писмо.
The friends I wrote to answered my letter.
Here, "којима" stands for the plural genitive or dative case, paired with "од" (from), referring to "филмови" (movies).