This is the 9537th most frequent French word.
défectueux
Faulty or defective.
Used to describe a product or item that is not functioning correctly.
Ce produit est défectueux et doit être retourné.
This product is defective and must be returned.
Used to refer to a system that exhibits faults or malfunctions.
J'ai découvert que le système mécanique était défectueux après une inspection minutieuse.
I found that the mechanical system was defective after a thorough inspection.
Describes specific parts or mechanisms within a device that are not operating properly.