This is the 14964th most frequent Polish word.
rowu
"Rowu" means "ditch" or "trench" in English.
Here, 'rowu' is used in the context of a place, specifically a ditch, and shows the genitive case form.
Robotnicy przechodzili przez rowu podczas pracy.
The workers were crossing the ditch during work.
In this sentence, 'rowu' again takes the genitive case but refers to the location where something was found.
Znaleziono w rowu stary rower.
An old bicycle was found in the ditch.
The word 'rowu' is in the genitive case, indicating the possession or location relative to the ditch.