cool

Great coolness and composure under strain.

“keep your cool”

The quality of being at a refreshingly low temperature.

“the cool of early morning”

Psychologically cool and unenthusiastic; unfriendly or unresponsive or showing dislike.

“relations were cool and polite”

“a cool reception”

Used of a quantity or amount (especially of money) for emphasis.

“a cool million bucks”

Marked by calm self-control (especially in trying circumstances); unemotional.

“play it cool”

“keep cool”

Being satisfactory or in satisfactory condition.

Fashionable and attractive at the time; often skilled or socially adept.

“he's a cool dude”

“that's cool”

Inducing the impression of coolness; used especially of greens and blues and violets when referring to color.

“cool greens and blues and violets”

“the cool sound of rushing water”

Neither warm nor very cold; giving relief from heat.

“a cool autumn day”

“a cool room”

Make cool or cooler.

Loose heat.

“The air cooled considerably after the thunderstorm”

Lose intensity.

“His enthusiasm cooled considerably”