The term CAR'S SAFETY DEVICE can be summarized as an airbag, which is a 6-letter word. An airbag is a safety device in cars that is designed to protect the driver and passengers from serious injury during a collision. It is a type of supplemental restraint system that consists of a flexible fabric bag filled with a gas that inflates rapidly when triggered by a sensor. Airbags are typically located in the steering wheel, dashboard, and side panels of a car.