Coolness
/ˈkuːl.nəs/noun
The quality or state of being cool, especially in temperature, manner, or composure.
Did you know?In English, the “cool” in “coolness” began as a literal temperature word, but over time it also took on the psychological sense of calm restraint, which is why “keeping cool” feels almost like a spell for self-control.
Etymological Timeline
Proto-Indo-European
PIE
*gel-
“to be cold, to freeze”
Old English
OE
cōl
“cool, not warm”
Middle English
ME
col
“cool, cold”
Late Middle English
ME
coolnesse
“the state of being cool; lack of heat”
Modern English
English
coolness
“the quality or state of being cool; composure or stylish detachment”