pneumatic (adjective)

1. In the novel, the protagonist discovers a hidden room filled with pneumatic tubes used to transport messages.

2. The futuristic spaceship is powered by a complex pneumatic system that enables it to travel smoothly through zero gravity.

3. Why did the parrot start his own pneumatic business? Because he wanted to be an air-mail delivery bird!

4. During the industrial revolution, the invention of the pneumatic drill revolutionized the mining industry by increasing efficiency and reducing labor-intensive tasks.