This is the 14427th most frequent Polish word.
przemytnicza
"Przemytnicza" means "smuggling-related" or "pertaining to smuggling."
In this sentence, 'przemytnicza' acts as an attribute to the noun 'działalność' referring to actions related to smuggling.
Czy to była przemytnicza działalność czy coś innego?
Was it smuggling activity or something else?
Here, 'przemytniczą' is used to modify 'naturę', describing the smuggling characteristics of their actions.
Mamy dowody na przemytniczą naturę ich działań.
We have evidence of the smuggling nature of their activities.
The word 'przemytnicza' here is used as an adjective to describe the operation engaging in smuggling activities.