This is the 10286th most frequent Swedish word.
italiensk
"Italiensk" means "Italian" in English.
Here, 'italiensk' is used as an adjective describing 'mat' (food), indicating dishes originating from Italy.
Jag älskar italiensk mat.
I love Italian food.
In this sentence, 'italienska' is the definite form of the adjective 'italiensk', agreeing with 'restaurangen' (the restaurant), which is definite and singular.
Den nya italienska restaurangen är mycket populär.
The new Italian restaurant is very popular.
Here, 'italiensk' is an adjective that modifies 'konst' (art), referring to art originating from Italy.