chill
noun
°A moderate, but uncomfortable and penetrating coldness.
"There was a chill in the air."
°A sudden penetrating sense of cold, especially one that causes a brief trembling nerve response through the body; the trembling response itself; often associated with illness: fevers and chills, or susceptibility to illness: close the window or you'll catch a chill.
"I felt a chill when the wind picked up."
adjective
°Moderately cold or chilly.
"A chill wind was blowing down the street."
°(slang) Calm, relaxed, easygoing. See also: chill out.
"I'm pretty chill most of the time."
verb
°To lower the temperature of something; to cool.
°(metallurgy) To harden a metal surface by sudden cooling.