cool-headed

[ kool-hed-id ]
/ ˈkulˈhɛd ɪd /

adjective

not easily excited; calm.

Origin of cool-headed

First recorded in 1770–80
Related formscool-head·ed·ly, adverbcool·head·ed·ness, noun
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2019

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