The Collaborative International Dictionary
Cool-headedness
cool-headed \cool"-head`ed\, coolheaded \cool"head*ed\, a. Having a temper not easily excited; free from passion; unshakably calm and collected. -- Cool"-head`ed*ness, n.
Syn: cool, imperturbable, unflappable.
Usage examples of "cool-headedness".
That was all well and good, Harrisson said, good for the machine-gunner’s cool-headedness and marksmanship, but the increase in VC activity indicated that reports of an impending enemy attack on the airfield were more than rumor.