mindmap root((冷静)) cool may imply calmness, deliberateness, or dispassionateness: kept a ~ head during the emergency. composed implies freedom from agitation as a result of self-discipline or a sedate disposition: the ~ pianist gave a flawless concert. collected implies a concentration of the mind or spirit that eliminates or overcomes distraction: even in heated debate she remains very ~. unruffled suggests apparent serenity and poise in the face of setbacks or in the midst of excitement: his mother remained ~ during the wedding. imperturbable implies a temperament that is cool or assured even under severe provocation: a guest speaker who maintained an air of ~ civility. nonchalant stresses an easy coolness of manner or casualness that suggests indifference or unconcern: ~ as ever, she ignored the crying baby.