This is the 1882nd most frequent Polish word.
nowak
"Nowak" is a common Polish surname, equivalent to "newman" or "newcomer" in English.
The word 'Nowak' here is a proper noun, typically a Polish surname, referring to a specific individual.
Pan Nowak jest dziś nieobecny.
Mr. Nowak is absent today.
In this context, 'Nowak' is used as a common noun type expression, referring to individuals with the last name Nowak.
Nie każdy Nowak to twój sąsiad.
Not every Nowak is your neighbor.
Here, 'Nowak' references a surname in a general query.