This is the 5186th most frequent Swedish word.
denis
The word "denis" is not a standard Swedish word; it may be a proper name or misspelling.
Here the word 'Denis' is used as a proper noun, specifically as a personal name of a friend.
Denis är en bra vän.
Denis is a good friend.
In this sentence, 'Denis' continues to be used as a proper noun, referring to a specific individual being spoken about.
Jag träffade Denis igår.
I met Denis yesterday.
Again, 'Denis' is utilized as a proper noun indicating the name of the colleague.