This is the 4035th most frequent Turkish word.
filenin
"Filenin" means "of the net" or "of the mesh" in English.
Here, 'filenin' refers to 'the net's' in the possessive form.
Filenin üzerinde yırtık fark ettim.
I noticed a tear on the net.
Here 'filenin' specifies the edge relating to 'the net'.
Takım arkadaşları, filenin kenarına dikkat etmeliyiz diye belirtti.
Team members stated that we should pay attention to the edge of the net.
In this sentence, 'filenin' signifies the net's defense.