The word "淘气" is formed by combining the character "淘", which consists of the water radical (氵) suggesting cleansing or sifting, with the phonetic component "匋", and the character "气", which represents air or vapor. Together, they literally denote "washing air", an impractical action that figuratively conveys the idea of unruly or mischievous behavior, as if one is pointlessly trying to control something as insubstantial as air.