This is the 285th most frequent French word.
fils
Son.
Here, 'fils' refers to 'son,' denoting a male child in family context.
Mon fils joue au football dans le parc.
My son is playing soccer in the park.
In this sentence, 'fil' refers to 'wire,' which is used as part of an object or connection.
Elle a réparé la lampe en remplaçant le fil électrique.
She fixed the lamp by replacing the electrical wire.
In this usage, 'fil' means 'thread,' indicating the material used for sewing.