This is the 574th most frequent Polish word.
osobiście
"Osobiście" means "personally" in English.
Here, 'osobiście' introduces the speaker's personal opinion.
Osobiście uważam, że warto spróbować tego dania.
Personally, I believe it's worth trying this dish.
In this context, 'osobiście' indicates a direct personal acquaintance.
Nie znam go osobiście, więc nie mogę o nim mówić.
I don't know him personally, so I cannot speak about him.
This usage of 'osobiście' emphasizes personal involvement in the action.