Zwingburg (g) is a German word made out of the root of the verb zwingen (to force or coerce) and Burg (fortress).
It is a fortress or castle or citadel erected in a prominent place in areas in which (to quote the German Wikipedia article), the local residents were considered 'insufficiently loyal' to whatever feudal lord owned the country. The design is purposely menacing, the building says 'I am your Lord. This ugly-ass fortress is full of lust-crazed Swabian mercenaries who will stream through your defenseless villages and daughters unless you show me unswerving obedience, reechy-necked lickspittles.'
It's a very Tscherman thing.
I thought of this word when I took a short bicycle ride through the Hafen (harbor) area in Düsseldorf last weekend. Back in the 90s, the city fathers decided to raze most of the existing port infrastructure on the Rhine as it fell into disuse and create a sexy, stylish area full of trendy boutiques, fashion houses, lux hotels, hip bars, and other hangouts for lawyers, lobbyists, advertising executives and other wan, dead-eyed parasites pillars of the local economy. They called it the Medienhafen (Media Harbor).
On a huge promontory in the middle of the Medienhafen stands the Düsseldorf Hyatt Regency Hotel (g), glowering menacingly at the rest of the city:
Hyatt. We're watching you.