This is the 9045th most frequent Polish word.
stanisławą
"Stanisławą" is the instrumental case of the Polish proper noun "Stanisława," which is a female given name.
'Stanisławę' is the accusative form of the name 'Stanisława,' indicating the direct object in the sentence.
Znam Stanisławę od wielu lat.
I have known Stanisława for many years.
'Stanisławą' is the instrumental form of the name 'Stanisława,' used with the preposition 'ze' meaning 'with'.
Rozmawiałem wczoraj ze Stanisławą.
I spoke with Stanisława yesterday.
'Stanisławę' in this sentence is the accusative case, indicating the person who is admired.