From Wiktionary, the free dictionary
Obelisk m (weak, genitive Obelisken, plural Obelisken)
- obelisk (a tall, square, tapered, stone monolith topped with a pyramidal point)
Declension of Obelisk [masculine, weak]
- “Obelisk” in Duden online
- “Obelisk” in Digitales Wörterbuch der deutschen Sprache