This is the 394th most frequent Finnish word.
uudet
"Uudet" means "new" in plural form.
In this sentence, 'uudet' is the plural nominative form of the adjective 'uusi' (new) and agrees with the plural noun 'kengät' (shoes).
Ostin uudet kengät.
I bought new shoes.
Here, 'uudet' is again the plural nominative form of 'uusi', matching with 'elokuvat' (movies), which is in its plural form.
Näemme uudet elokuvat ensi viikolla.
We will see new movies next week.
Here, 'uudet' is an adjective describing the noun 'kengät' (shoes), indicating that the shoes are new.