This is the 277th most frequent Norwegian word.
trondheim
"Trondheim" is the name of a city in Norway.
Here 'Trondheim' is used as a proper noun, representing the name of a specific city in Norway.
Trondheim ligger i Norge og er en historisk by.
Trondheim is located in Norway and is a historical city.
In this case, 'Trondheim' remains as a proper noun but is used as an object of the verb 'to visit', indicating a destination.
Jeg planlegger å besøke Trondheim i sommer.
I plan to visit Trondheim in the summer.
The word 'Trondheim' here defines the specific place related to the local population being described.