Undercarriage (noun)

The lower part of a vehicle, aircraft or a landing gear of an airplane.

Origin:

From the prefix under- meaning beneath and the word carriage.

Examples:

1. The undercarriage of the plane was damaged during the emergency landing.
2. The undercarriage of the car was in need of repair.
3. The undercarriage of the train was designed to absorb the shock of the tracks.
4. The pilot was advised to check the undercarriage before takeoff.
5. The mechanic checked the undercarriage for any signs of wear and tear.