This is the 9892nd most frequent French word.
fir
The French word "fir" does not exist; it may be a misspelling. If you meant "sapin," it translates to "fir tree" in English.
The word 'sapins' is in plural form and indicates multiple instances of fir trees in a descriptive context.
La forêt est remplie de sapins majestueux.
The forest is filled with majestic fir trees.
Here, 'sapin' is used as a noun to refer to the tree itself.
Le sapin est un symbole de Noël.
The fir tree is a symbol of Christmas.
In this sentence, 'sapin' describes the object that was decorated.