This is the 10816th most frequent Polish word.
działu
"Działu" means "department" or "section."
In this sentence, 'działu' is the genitive case of 'dział' (department), indicating belonging or association to the sales department.
Kierownik działu sprzedaży zaproponował nową strategię.
The sales department manager proposed a new strategy.
Here, 'działu' in the genitive case signifies the source or origin of the data, referring to the 'department of research work'.
Zebraliśmy dane z działu prac badawczych.
We gathered data from the research department.
In this example, 'działu' denotes a section or category within a library, showing the classification purpose of 'dział'.