This is the 3795th most frequent Turkish word.
öldürdüğünü
"Öldürdüğünü" means "that (he/she/it) killed" in English.
The word 'öldürdüğünü' here is used to indicate a reported action of the subject (hero), connected with the verb 'öl'dür'düğünü' (killed), reflecting an objective genitive clause.
Bu masalda, kahramanın devin öldürdüğünü anlatıyor.
In this tale, it tells about the hero killing the giant.
The usage of 'öldürdüğünü' functions in the sentence to report a direct evidence-based action performed by the subject (killer), forming a subordinate clause.
Polis, katilin kurbanı öldürdüğünü kanıtladı.
The police proved that the murderer killed the victim.
In this example, 'öldürdüğünü' indicates a statement or claim about an action (killed), relating to the direct experience or report from the witness.