This is the 763rd most frequent Hungarian word.
dolgozó
Worker.
In this sentence, 'dolgozó' is used as a noun meaning 'worker'.
A dolgozó ma sok feladatot elvégzett.
The worker completed many tasks today.
Here, 'dolgozó' is again a noun, but it is used more formally to mean 'employee'.
Minden dolgozó be kellett, hogy fejezze a jelentést.
Every employee had to finish the report.
In this instance, 'dolgozó' is an adjective describing the noun 'room', which indicates its purpose as a 'working' space.