This is the 67th most frequent Finnish word.
uutta
"Uutta" means "new" (partitive case) in English.
Uuden is the partitive form of 'uusi' used here to modify 'auton', with 'uutta' specifying 'something new' that I bought.
Ostin uuden auton, ja se on todella mukava.
I bought a new car, and it's very nice.
Here, 'uutta' is in the partitive case, conveying the idea of trying something new, while modifying 'ravintolaa'.
Haluaisin kokeilla jotain uutta ravintolaa tänä iltana.
I'd like to try a new restaurant tonight.
In this usage, 'uutta' directly refers to 'new,' combined here to emphasize 'entirely new information' in the partitive sense.