v.使轻松，变得轻松；发亮，变亮；照亮；减轻，变轻；闪电；使变淡
Her heart lightened when she heard the news. 听到这消息，她轻松了。
His face lightened as she apologized. 她向他道歉时，他喜形于色。
A solitary candle lightened the darkness of the room. 一支孤烛使黑暗的房间亮了起来。
If you want to lighten the weight, had better eat little bread. 如果你想减轻体重，最好少吃面包。
adj.未受启蒙的；无知的
