This is the 3712th most frequent French word.
poirier
Pear tree.
In this sentence, "poirier" is used as a noun to refer to the pear tree itself.
Le poirier dans le jardin est plein de poires mûres.
The pear tree in the garden is full of ripe pears.
Here, "poirier" again acts as a noun, emphasizing the action of planting a specific type of tree.
Je vais planter un poirier dans le verger.
I am going to plant a pear tree in the orchard.
The word "poirier" is used metaphorically here, illustrating how language can convey figures of speech using common objects.