'Cool' in the Bible

and Ehud came to him [while] he [was] sitting alone in his cool upper room. And Ehud said, "I have a {message from God} for you." So he got up from his seat.

After he left, his servants returned. When they saw [that] the doors of the upper room [were] locked, {they thought}, "Surely he [is] {relieving himself} in the cool inner room."

He who spares his sayings knows knowledge, and a cool spirit is a man of understanding.

As a water well keeps its water cool, so she keeps cool her wickedness. Violence and destruction are heard within her, sickness and wounds [are] continually {before me}.