This is the 11605th most frequent French word.
réservoir
A container or place for storing liquid or other substances.
Here, 'réservoir' refers to a container (tank) holding fuel for a car.
Le réservoir de la voiture est presque vide.
The car's tank is almost empty.
Here, 'réservoir' means a storage unit designed for holding water.
Nous avons vu un grand réservoir d'eau près de la ferme.
We saw a large water reservoir near the farm.
In this sentence, 'réservoir' is used metaphorically to represent a source or collection.