n.[U]

1. 清楚，明白
   Because of his plainness of speech, he succeeded in making his point.

   由於他措詞清楚，他成功地表明了自己的觀點。

2. 樸素，儉樸
   There was an elegant plainness in this small house.

   這小屋子裡有一種高雅的樸素。

3. 率直，坦率
   The doctor had spoken with so much plainness that she was convinced to modify her treatment.

   醫生講得如此坦率，她被說服修改她的治療方案。