This is the 9253rd most frequent Polish word.
tortownica
Springform pan.
Here, 'tortownica' is described as an item owned and its characteristics are commented upon.
Tortownica, którą kupiłem, jest bardzo praktyczna.
The springform pan I bought is very practical.
Here, 'tortownica' refers to the item, a springform pan, used in baking a cake.
Piekąc ciasto, użyła nowej tortownicy.
While baking a cake, she used a new springform pan.
In this sentence, 'tortownica' refers to an object that is being requested.