This is the 17411th most frequent Polish word.
zarobkowego
"Zarobkowego" means "related to earning or income."
Here 'zarobkowa' is used as an adjective modifying 'praca', meaning 'earning' or 'gainful' to describe a type of work.
Praca zarobkowa jest dla mnie odpowiednim sposobem zarobienia pieniędzy.
Gainful employment is a suitable way for me to earn money.
In this sentence, 'zarobkowa' describes 'działalność', indicating that the activity is aimed at generating income.
Działalność zarobkowa wymaga odpowiednich zezwoleń.
Profit-oriented activities require proper permissions.
The word 'zarobkowa' again functions as an adjective, characterizing 'praca' as being related to earning or income generation.