keep cool

Idioms  

1. Also, keep a cool head; stay cool; be cool; (take it cool). Remain calm and under control, as in Keep cool, they'll soon show up, or Be cool, the surprise is not spoiled, or You have to keep a cool head in these volatile situations, or Sit tight, take it cool, they won't bother you again. All these terms employ cool in the sense of “not heated by strong emotion,” a usage dating from the late 1300s or even earlier. The first three expressions are colloquial and date from the second half of the 1800s; both of the last two are slang, and the very last (take it cool) is the oldest, first recorded in 1841. Also see keep one's cool; play it cool.

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Example Sentences

As they raised their hands in prayer, some held up umbrellas and books over their heads to keep cool.

From BBC • Apr. 17, 2026

“We are telling clients to keep cool, fill your tank right now before it gets higher, drive a little less and look forward to a 7700 S&P by year-end,” he said.

From The Wall Street Journal • Mar. 6, 2026

To replicate this operation at scale requires whole data centers’ worth of GPUs, which produce audible noise and require a lot of water to keep cool.

From Slate • Mar. 28, 2025

Grinder added that every year she has seen less rain, more dust and skyrocketing electricity rates as residents try to keep cool.

From Salon • Nov. 3, 2024

All afternoon we feasted on Popsicles to keep cool.

From "Betty Before X" by Ilyasah Shabazz and Renée Watson