Spelling.School · How to spell

How to spell cool

Cool is spelled C-O-O-L.

What it means: Having a low temperature.

In a sentence: The ice cream was cold and cool on a hot day. ▶

The part people get wrong

Watch for double o.

Same family: coolness, coolly, cool-headed, keep-your-cool, lose-your-cool. If you can spell one, the shared part carries to the others.

Where it comes from: The noun "cool" grew out of the older adjective "cool," which originally described temperature and later calm behavior. By the 18th century, people were already talking about "keeping one's cool" to mean staying calm under pressure.

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