This is the 15422nd most frequent Polish word.
spinaczkowych
"Spinaczkowych" means "related to climbing" in English.
In this sentence, 'spinaczkowych' is used as a descriptive adjective referring to activities related to climbing, derived from the noun 'spinaczka' (climbing).
Ludzie kupowali sprzęt do aktywności spinaczkowych.
People were buying equipment for climbing activities.
Here, 'spinaczkowych' characterizes the type of conditions (climbing-related) in which Marek aspired to achieve his goal, serving a descriptive role.
Marek marzył o zdobyciu szczytów w warunkach spinaczkowych.
Marek dreamed of conquering peaks under climbing conditions.
The adjective 'spinaczkowych' modifies 'wypraw' (expeditions), specifying that the expeditions are related to climbing.