This is the 726th most frequent Hungarian word.
osztrák
Austrian
In this sentence, 'osztrák' is used as an adjective to describe nationality and modifies the noun 'actor'.
Ő egy osztrák színész.
He is an Austrian actor.
Here, 'osztrák' is an adjective describing the origin or characteristic of the landscape.
Az osztrák táj szépsége lenyűgöző.
The beauty of the Austrian landscape is stunning.
In this case, 'osztrák' acts as a noun representing a person from Austria.