marked by calm self-control especially in trying circumstances; "a cool negotiator"; "play it cool"; "keep cool"; "remained coolheaded in the crisis"; "one of the most nerveless champions in the history of the tournament"
lacking strength; "a weak, nerveless fool, devoid of energy and promptitude"- Nathaniel Hawthorne
marked by calm self-control (especially in trying circumstances); unemotional; "play it cool"; "keep cool"; "stayed coolheaded in the crisis"; "the most nerveless winner in the history of the tournament"
marked by calm self-control (especially in trying circumstances); unemotional
