air

Air is a mixture of gases. It has no color or odor (smell)

Example: We breathe air to live.

You put on airs when you act arrogantly.

Example: The woman put on the airs in front of her friends.

If you air something, you broadcast it, either over the radio, or on television.

Example: Hurry! You'll miss the story about homeless children that is about to air on the local news!