This is the 414th most frequent Croatian word.
našeg
"Našeg" means "our" (genitive or accusative singular form).
Here, 'našeg' is used in the genitive singular masculine form, matching with 'psa', which is the noun it modifies, to indicate possession.
To je slika našeg psa.
That is a picture of our dog.
In this sentence, 'našeg' is the genitive singular masculine form of the possessive pronoun 'naš'. It modifies 'prijatelja' to express possession.
Idemo kod našeg prijatelja.
We are going to our friend's place.
In this sentence, 'našeg' aligns in gender, number, and case with 'autobusa', the object noun, showing possession.