This is the 3207th most frequent Polish word.
siedzieć
"To sit."
The verb 'siedzieć' is used here to indicate the action of being in a seated position.
Siedzę na ławce w parku.
I am sitting on a bench in the park.
The verb 'siedzieć' is used metaphorically to describe staying at one place or keeping still.
Nie mogę siedzieć w miejscu, muszę się ruszać.
I can't sit still, I need to move.
The verb 'siedzieć' emphasizes being seated in combination with the action of being quiet.