This is the 12565th most frequent Polish word.
narciarskiego
"Narciarskiego" means "skiing" or "ski-related" as an adjective in English.
The word 'narciarski' is used as an adjective to describe the suit, meaning it pertains to skiing.
Wczoraj kupiłem nowy kombinezon narciarski.
Yesterday, I bought a new skiing suit.
Here, 'narciarski' modifies the noun 'season', meaning it relates to skiing activities.
Sezon narciarski zaczyna się w grudniu.
The skiing season begins in December.
In this case, 'narciarski' is an adjective qualifying the noun 'course', indicating that the course is related to skiing.