This is the 17916th most frequent Polish word.
łyżwach
"Łyżwach" means "ice skates."
The word 'łyżwach' is used in the locative case to indicate the act of skating on ice skates.
Jeżdżę na łyżwach.
I am skating.
Here, 'łyżwach' is used in the locative case to specify the skates being discussed.
Czy masz jakieś nowe wiadomości o łyżwach?
Do you have any new information about skates?
In this sentence, 'łyżwach' again is in the locative case, showing the medium (skates) involved in the action of skating and falling.