This is the 12566th most frequent Polish word.
narciarską
"Narciarską" means "skiing" (adjective, related to skiing).
The word 'narciarską' is used as an adjective modifying the noun 'kurtkę' (jacket), indicating that the jacket is designed for skiing.
Kupiłem sobie nową kurtkę narciarską na zimowe wakacje.
I bought a new ski jacket for the winter vacation.
Here, 'narciarską' serves as an adjective relating to weather that is suitable for skiing.
Nasza drużyna ćwiczyła swoje umiejętności na narciarską pogodę.
Our team practiced their skills for skiing weather.
In this sentence, the term 'narciarską' describes the type of trip being a skiing expedition.