lightens , lightening , lightened
When something lightens or when you lighten it, it becomes less dark in colour.
The sky began to lighten.
天空开始变得明亮了。
If someone lightens a situation, they make it less serious or less boring.
Anthony felt the need to lighten the atmosphere.
安东尼觉得需要缓和一下气氛。
If your attitude or mood lightens, or if someone or something lightens it, they make you feel more cheerful, happy, and relaxed.
As they approached the outskirts of the city, Ella's mood visibly lightened.
随着他们越来越接近市郊,埃拉的心情明显变得轻松了。