Englishfor English speakers
air
Noun
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Air is a mixture of gases. It has no color or odor (smell)
We breathe air to live.
—
You put on airs when you act arrogantly.
The woman put on the airs in front of her friends.
air
Verb
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If you air something, you broadcast it, either over the radio, or on television.
Hurry! You'll miss the story about homeless children that is about to air on the local news!
heating
Noun
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The heating is the system that keeps a house or building warm.
We put new gas heating into the house to make it warmer.
unit
Noun
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One of a measure of something; the amount of something that is counted as "one".
Measure five units to the left.
$4 is the unit price.
A pound is a useful unit for thinking about amounts of butter.
—
Form of measurement.
I prefer metric units.
—
Item, used when no other word for something exists.
He set up the A/C unit.