The term is not a description of a state but a name of car parts (usually springs) that absorb shocks by pulsating to keep the car relatively stable. The definition is found in Sakhr (in Family Program Disc) exactly as given in the answer whereas Ectaco also confirms them to be "tools" or أدوات لتعليق شيء، Sakhr providing the exact terminology needed.
Perhaps a little more context and a little more time for other inputs would have given the more appropriate answer. This is of course with all due respect to the selected anwerer and asker.

Suspension is the term given to the system of springs, shock absorbers and linkages that connects a vehicle to its wheels. Suspension systems serve a dual purpose – contributing to the car's handling and braking for good active safety and driving pleasure, and keeping vehicle occupants comfortable and reasonably well isolated from road noise, bumps, and vibrations.