This is the 12438th most frequent Turkish word.
hikayeyi
"The story" (accusative case of "hikaye").
The word 'hikayeyi' is in the accusative case, functioning as the direct object of the verb 'beğendi'.
Ahmet hikayeyi çok beğendi.
Ahmet liked the story very much.
Here, 'hikayeyi' is also in the accusative case, used as the direct object of the verb 'anlattı'.
Arkadaşım bana ilginç bir hikayeyi anlattı.
My friend told me an interesting story.
In this sentence, 'hikayeyi' in the accusative case serves as the object of the verb 'okudun'.