This is the 3415th most frequent Dutch word.
marathon
A long-distance running race, typically 42.195 kilometers (26.2 miles).
Here, 'marathon' is used to refer to a long-distance running event, typically 42.195 kilometers in length.
Ik heb gisteren een marathon gelopen.
I ran a marathon yesterday.
In this context, 'marathon' is used metaphorically to describe a lengthy and demanding experience.
Onze vergadering voelde als een mentale marathon.
Our meeting felt like a mental marathon.
Again, 'marathon' refers to the common long-distance running event, but the emphasis is on its occurrence and organization.