This is the 14951st most frequent Polish word.
rosn
The word "rosn" is likely a misspelling or incomplete form. If you meant "rosną," it means "to grow."
Usage refers to the natural growth of organisms.
Drzewa w lesie rosną bardzo szybko.
The trees in the forest grow very quickly.
Usage refers to increasing values or amounts.
Rosnące ceny mieszkań martwią ludzi.
Rising housing prices worry people.
Usage refers to emotional or internal development.