Compress (verb)

1. To press something firmly, typically in order to reduce its size or volume.
2. To press or squeeze something, typically in order to remove excess liquid.

Origin:

Late middle english: from latin compress- "pressed together", from the verb comprimere, from com- "together" + premere "to press".

Examples:

1. He compressed the air out of the bag.
2. She compressed the air out of the mattress.
3. The air was compressed in the cylinder.
4. The air was compressed in the tank.
5. The air was compressed in the compressor.