Daily Chinese Idiom Guessing Game
To describe or handle something in a light, casual, or understated manner, often downplaying its importance.
原指描绘时用浅淡的颜色轻轻地着笔。现多指说话写文章把重要问题轻轻带过。
清·吴趼人《二十年目睹之怪现状》第四十八回臬台见他说得这等轻描淡写，更是着急。”
He mentioned his promotion with a sense of indifference, as if it were nothing special.