This is the 3796th most frequent Polish word.
norweg
The Polish word "Norweg" means "Norwegian" (a person from Norway).
Here, 'Norweg' is used as a noun to refer to a male person from Norway.
Mój sąsiad to Norweg.
My neighbor is a Norwegian.
In this sentence, 'Norweg' is used as a noun to denote a person from Norway, and its form changes to 'Norwega' as per grammatical rules to indicate the objective case.
Kupiliśmy norweskie sery od Norwega.
We bought Norwegian cheeses from a Norwegian.
While 'Norweg' means Norwegian (male) as a noun, in this sentence, the related word 'Norwegia' is used as the name of the country (Norway).