This is the 537th most frequent Polish word.
wiedzieć
"To know" (in terms of knowledge or awareness).
In this sentence, 'wiedzieć' is used in the context of knowledge or awareness about the location of the nearest store.
Czy wiesz, gdzie jest najbliższy sklep?
Do you know where the nearest store is?
Here, 'wiedzieć' is employed in the past tense 'wiedziałem' to describe having known or being aware of a fact in the past.
Wiedziałem, że coś jest nie w porządku.
I knew something was wrong.
In this example, 'wiedzieć' expresses the intention or desire to learn or be informed about an event.