This is the 2170th most frequent Polish word.
powstają
"Powstają" means "they arise" or "they are created."
The verb 'powstają' indicates the act of arising or being constructed.
Nowe budynki powstają w centrum miasta.
New buildings are being constructed in the city center.
Here 'powstają' is used to mean 'are produced' or 'come into being' in relation to abstract items like ideas.
Często powstają nowe pomysły podczas burzy mózgów.
New ideas often emerge during brainstorming.
In this context, 'powstają' signifies 'emerge' or 'arise' as a result of a situation or difference.