This is the 10583rd most frequent French word.
marathon
A long-distance running race of 42.195 kilometers (26.2 miles).
Here, 'marathon' refers to a long-distance running race.
Je me suis inscrit à un marathon qui aura lieu ce mois-ci.
I registered for a marathon that will take place this month.
In this context, 'marathon' is used metaphorically to describe something long and demanding.
La réunion d'hier était un véritable marathon.
Yesterday's meeting was a real marathon.
Here, 'marathon' is used figuratively to indicate the prolonged effort needed to complete a task at once.