Coolly (adverb)
In a cool, unpanicked or collected manner.
Coolly (adverb)
With calm impudence.
“They walked in, not even wearing masks, and coolly robbed the bank of twelve thousand pounds.”
Coolly (adjective)
coolish; somewhat cool in temperature
Nonchalantly (adverb)
In a nonchalant manner.
Wiktionary
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