名詞 air-cushion:

1. the trapped air that supports a hovercraft a short distance above the water or ground
   同義詞：air cushion
2. a mechanical device using confined air to absorb the shock of motion
   同義詞：air cushion, air spring
3. a cushion usually made of rubber or plastic that can be inflated
   同義詞：air cushion, inflatable cushion