This is the 4855th most frequent Polish word.
osobistą
"Osobistą" means "personal" in English.
Here, 'osobistą' is used as an adjective to describe 'odpowiedzialność' (responsibility), emphasizing that the responsibility is personal or individual.
Mam osobistą odpowiedzialność za ten projekt.
I have a personal responsibility for this project.
In this sentence, 'osobistą' modifies 'historią' (story), signifying that the story is personally experienced or related to the individual.
Podczas spotkania, poruszyło mnie jej osobistą historią.
During the meeting, her personal story moved me.
Here, 'osobistą' characterizes 'własność' (possession) to specify that the possession belongs to the individual's personal domain.