This is the 8814th most frequent German word.
köniz
"Köniz" is not a German word; it is a proper noun referring to a municipality in Switzerland.
Here, 'Köniz' is used as a proper noun, referring to the name of a specific place.
Köniz ist eine Stadt in der Schweiz.
Köniz is a town in Switzerland.
'Könizer' is an adjective derived from 'Köniz', used to describe something or someone from that town.
Die Könizer Einwohner sind sehr freundlich.
The residents of Köniz are very friendly.
In this sentence, 'Köniz' functions as a locative noun indicating the place where the action occurred.