This is the 780th most frequent Hebrew word.
אישי
Personal.
The word 'אישי' is used to describe a personal attribute or aspect.
יש לי עניין אישי בנושא הזה.
I have a personal interest in this matter.
Here 'אישי' is used as an adjective qualifying 'thoughts,' indicating that the thoughts belong to an individual's private domain.
היא משתפת אותי במחשבותיה האישיות.
She shares her personal thoughts with me.
In this sentence, 'אישי' is used to describe the nature of the story as being closely associated with someone's emotions or personal experiences.