This is the 5447th most frequent Polish word.
szwajcarskich
"Swiss" (adjective, genitive plural form).
In this sentence, 'szwajcarskich' is an adjective in the genitive plural form, describing the noun 'winnic' (vineyards).
Odwiedziliśmy wiele szwajcarskich winnic podczas naszej podróży.
We visited many Swiss vineyards during our trip.
Here, 'szwajcarskich' is an adjective in the locative plural form, modifying the noun 'alpinistach' (mountaineers).
Książka zawiera opowieści o szwajcarskich alpinistach.
The book contains stories about Swiss mountaineers.
In this example, 'szwajcarskich' is an adjective in the genitive plural form, specifying the noun 'zegarów' (clocks).