This is the 11744th most frequent Swedish word.
personligt
"Personligt" means "personal" in English.
The word 'personligt' is used here as an adjective to describe something that pertains to or is characteristic of a person, indicating a personal opinion or matter.
Jag anser att detta är något väldigt personligt.
I believe that this is something very personal.
In this sentence, 'personligt' is used to imply that some information should be kept private or personal to oneself.
Det är viktigt att hålla en del information personligt.
It is important to keep some information personal.
Here, 'personligt' is applied to describe the feeling or character of writing a diary, emphasizing the intimate or individual nature of the activity.