This is the 533rd most frequent Polish word.
sądu
The Polish word "sądu" means "court" (genitive singular form).
Here, 'sądu' refers to an institution serving as a court of law.
Idę do sądu, aby złożyć dokumenty.
I am going to the court to submit documents.
In this sentence, 'sądu' is used in a locational context, indicating the area next to the court.
Obok sądu znajduje się ładny park.
Next to the court, there is a nice park.
'Sądu' in this context indicates possession, referring to a decision issued by the court.