This is the 5907th most frequent Polish word.
zimowych
"Zimowych" means "winter" or "of winter" (adjective, genitive or plural form in Polish).
Here, 'zimowych' modifies 'ferii', indicating the winter holidays.
Podczas zimowych ferii dzieci często jeżdżą na nartach.
During the winter break, children often go skiing.
In this sentence, 'zimowych' describes 'opony', referring to tires suitable for winter conditions.
Kupiliśmy nowe opony zimowych do naszego samochodu.
We bought new winter tires for our car.
Here, 'zimowych' is used to qualify 'krajobrazów', meaning landscapes characteristic of winter.