This is the 3454th most frequent Polish word.
zawodowy
Professional.
The word 'zawodowy' is used as an adjective to describe equipment that is suitable for professional use.
Mam zawodowy sprzęt fotograficzny.
I have professional photographic equipment.
Here, 'zawodowy' modifies 'rozwój' (development), referring to progress in one's professional career or skills.
Jego rozwój zawodowy jest imponujący.
His professional development is impressive.
In this instance, 'zawodowy' pertains to 'sukces' (success), indicating achievement in one's professional life.