casualness
n. 偶然；无心；随便
近义词：freedom，informality，nonchalance，calmness，coolness，insouciance，unconcern，indifference，carelessness，negligence，disregard，heedlessness，inattention，familiarity，
英英释义
Noun
- a casual manner
例句
- He filmed at the casualness of the Waiter.他为服务员漫不精心的态度大为恼火。