1. (adjective) having a lower part projecting beyond the upper

• underhung
• undershot

2. (adjective) having a low center of gravity; built low to the ground

• squat

1. (adjective) supported from above especially in a vehicle having springs attached to the axle from below

• supported

2. (adjective) having a lower part projecting beyond the upper

• protrusive

3. (adjective) having a low center of gravity; built low to the ground

• low

1. (adjective) having a low center of gravity; built low to the ground

• squatness
• stubbiness