This is the 16716th most frequent Russian word.
сковородой
"Skovorodoy" means "frying pan" in the instrumental case in Russian.
In this sentence, 'сковородой' is an instrumental case form of the word 'сковорода', used to indicate the tool with which the action 'готовила' (cooked) is performed.
Она готовила ужин с новой сковородой.
She cooked dinner with a new frying pan.
Here, 'сковородой' again appears in the instrumental case, indicating the item required or used for a specific purpose (making pancakes).
Для блинов нужно пользоваться хорошей сковородой.
For pancakes, one needs to use a good frying pan.
In this example, 'сковородой' is instrumental, specifying the object used to perform the action 'ударил' (hit).