lighten
/ˈlaɪtn/📚 8756 69 1四级六级When something lightens or when you lighten it, it becomes less dark in colour. 使变明亮; 变得明亮
verb [vi. 不及物动词]减轻；发亮
The sky began to lighten.
天空开始变得明亮了。
verb [vt. 及物动词]vt. 使照亮；使轻松
If someone lightens a situation, they make it less serious or less boring.
缓和Anthony felt the need to lighten the atmosphere. 安东尼觉得需要缓和一下气氛。
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