This is the 4451st most frequent Polish word.
kasku
"Kasku" is the locative or dative form of "kask," which means "helmet" in English.
The word 'kasku' is used in the locative case (miejscownik), indicating the location or situation in which the action is taking place.
Zawsze jeżdżę na rowerze w kasku.
I always ride my bike with a helmet.
The word 'kasku' is used in the genitive case (dopełniacz), representing possession or association, as in 'your helmet'.
Nie zapomnij swojego kasku, jeśli idziesz na wycieczkę rowerową.
Don't forget your helmet if you're going on a bike trip.
The word 'kasku' is in the genitive case (dopełniacz), utilized after 'do', which is a preposition requiring the genitive case.