n.敏捷，迅速，机敏...

The manager replied with promptness and courtesy.那经理思路敏捷、彬彬有礼地作了答复.This promptness proved how strictly he had held to his word.这足以表示,他是多么谨守前约.He arrived with his customary promptness.他像惯常那样准时到达....

promptness的音标：promptness的英式发音音标为：[prɒmptnəs]promptness的美式发音音标为：[prɒmptnəs]...