This is the 15758th most frequent German word.
zwölfstöckigen
"Twelve-story" (referring to a building with twelve floors).
Here, 'zwölfstöckigen' is used as an adjective to describe a skyscraper with twelve floors.
Das neue Bürogebäude ist ein beeindruckendes zwölfstöckiges Hochhaus.
The new office building is an impressive twelve-story skyscraper.
In this sentence, 'zwölfstöckigen' is part of a compound adjective describing the building's characteristic.
Die Architektur des zwölfstöckigen Gebäudes erhält viel Lob.
The architecture of the twelve-story building receives much praise.
The usage of 'zwölfstöckigen' here provides specific detail about the residential building's number of stories.