This is the 7589th most frequent French word.
rail
A rail is a bar or rod, typically made of metal, used as a track for trains or as a support or guide.
Here, 'rail' is used as a noun to refer to the individual track on which the train travels.
Le train roule sur le rail.
The train runs on the rail.
In this sentence, 'rail' is used as a noun referring to a metal bar commonly used in activities like skateboarding for performing tricks.
Ils ont installé un rail pour faire du skate.
They installed a rail for skateboarding.
Here, 'rail' is used to describe the horizontal bar or track constituting part of a fence's structure.