This is the 5525th most frequent German word.
bertolli
"Bertolli" is not a German word; it is an Italian brand name for olive oil and related products.
Here, 'Bertolli' refers to the brand name of the olive oil purchased.
Ich kaufte eine Flasche Bertolli Olivenöl im Supermarkt.
I bought a bottle of Bertolli olive oil at the supermarket.
In this sentence, 'Bertolli' serves as an adjective specifying the brand of olive oil being described.
Das Bertolli Olivenöl verleiht dem Salat einen wunderbaren Geschmack.
The Bertolli olive oil gives the salad a wonderful flavor.
Here, 'Bertolli' functions as a proper noun, indicating the company or brand associated with the recipe.