This is the 15127th most frequent Polish word.
rządzić
To govern or rule.
'rządził' is used to mean 'ruled' in the context of governing or leading a country or territory.
Król rządził swoim królestwem przez wiele lat.
The king ruled his kingdom for many years.
'rządzi' refers to 'leads or manages' in the context of organizing and directing a group of people.
Kierownik dobrze rządzi zespołem projektowym.
The manager leads the project team well.
'rządzi' means 'dominates or prevails' referring to being the most influential or leading entity in a particular area.