This is the 8875th most frequent German word.
lampertheimer
"Lampertheimer" is not a standard German word; it refers to something or someone from Lampertheim, a town in Germany.
Here, "Lampertheimer" is an adjective derived from the town name Lampertheim, describing the Christmas market as specific to Lampertheim.
Ich besuchte den Lampertheimer Weihnachtsmarkt mit meinen Freunden.
I visited the Lampertheim Christmas market with my friends.
In this sentence, "Lampertheimer" is used as an adjective to indicate that the specialties are from Lampertheim.
Die Lampertheimer Spezialitäten sind über die Stadtgrenzen hinaus bekannt.
The Lampertheim specialties are known beyond the city limits.
"Lampertheimer" functions as a noun to indicate residents or people associated with Lampertheim.