lighten

lighten1
verb
  1. make or become lighter in weight, pressure, or severity
    减轻(重量、压力或严重程度)
    [with obj.]efforts to lighten the burden of regulation.
    减轻调控工作负担的尝试。
    [no obj.]the strain had lightened.
    压力已经减轻了。
    ■make or become more cheerful or less serious
    使轻松愉快
    [with obj.]she attempted a joke to lighten the atmosphere.
    她试图通过开玩笑让气氛轻松起来。
    [no obj.]Robbie felt her spirits lighten a little.
    罗比觉得她的情绪轻松了一点儿。

lighten2
verb
  1. make or become lighter or brighter
    使亮一些
    [no obj.]the sky began to lighten in the east.
    东方的天空开始发亮了。
    [with obj.]she had lightened her hair.
    她已经把头发弄亮了些。
    ■[with obj.](archaic)enlighten spiritually
    (古)启迪,开导
    now the Lord lighten thee, thou art a great fool.
    汝大愚矣,愿主多多开导。
  2. [no obj.](it lightens, it is lightening,等)(rare)emit flashes of lightning; flash with lightning
    (罕)闪电划过
    it thundered and lightened.
    电闪雷鸣。
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