This is the 11542nd most frequent Polish word.
kanapkę
"Kanapkę" means "sandwich" in English.
Here 'kanapkę' is used in the accusative case as it is the direct object of the verb 'mam' (I have).
Mam kanapkę na drugie śniadanie.
I have a sandwich for a second breakfast.
The word 'kanapkę' here is also in the accusative case; it is part of the object of the question being addressed.
Chcesz kanapkę z szynką czy serem?
Would you like a sandwich with ham or cheese?
'Kanapkę' is the direct object of the imperative verb 'znajdź' (find), showing action directed towards it.