This is the 4989th most frequent Polish word.
polityką
The Polish word "polityką" means "politics" or "policy" in English, in the instrumental case.
Here, 'polityką' is instrumental case, referring to the subject of interest.
Jestem zainteresowany polityką.
I am interested in politics.
In this sentence, 'polityką' is also in instrumental case, used to describe the field of professional activity.
Zajmuję się zawodowo polityką.
I work professionally in politics.
Here, 'polityką' remains instrumental and signifies the topic being discussed or engaged with.