This is the 707th most frequent Finnish word.
uuden
"Uuden" means "of the new" in English.
In this sentence, 'uuden' is the genitive form of 'uusi', modifying 'auton' to mean 'new car'.
Ostin uuden auton.
I bought a new car.
'Uuden' here describes 'tilaisuuden', emphasizing its freshness and novelty.
Hän aloitti alusta uuden tilaisuuden edessä.
He started anew in front of a new opportunity.
The word 'uuden' is the accusative case of 'uusi' (new), modifying the object 'auton' (car) and indicating that the car being referred to is new.