This is the 161st most frequent Slovenian word.
nov
"Nov" in Slovenian means "new" in English.
In this sentence, 'nov' is used as an adjective describing the freshness or the new state of the noun 'car' as a new purchase.
Kupil sem nov avto.
I bought a new car.
Here, 'nov' is used to describe the novelty or freshness of a concept, which is the 'beginning' here.
To je zame povsem nov začetek.
This is a completely new beginning for me.
In this example, 'nov' modifies the noun 'day' to imply an occurrence that introduces novelty or start.