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Avoid these words. Seriously.

keep cool

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
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
The American Heritage® Idioms Dictionary
Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.
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Examples from the Web for keep cool
Contemporary Examples
Historical Examples
  • Oh, that would be too long telling, Florry, and that'll keep cool.

  • His father was nervous, but advised Paul to keep cool or all would be lost.

    Oswald Langdon Carson Jay Lee
  • "That's one way to keep cool at a clambake," grinned the man in gray.

    Frank Merriwell's Cruise Burt L. Standish
  • At the end of the rain-storm the weather helped Parker to keep cool.

  • "Remember, John, keep cool and keep jabbing that left in his face," he said.

    Spring Street James H. Richardson
  • You might as well put the milk-can in the stream to keep cool.

  • "Yes, keep cool, Kunnel; it's only our solicitude for your welfare," chipped in Foster.

    Prairie Folks Hamlin Garland
  • Stuart asked, with sudden anger in spite of his effort to keep cool.

    The Root of Evil

    Thomas Dixon

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