词典释义：
释义
v.
become or make black or dark, especially as a result of burning, decay, or bruising
（使）变黑，熏黑，（使）变暗
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[no obj.]
he set light to the paper, watching the end blacken as it burned 他把光集中到纸上，看着纸边被烧焦变黑
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[with obj.]
stone blackened by the soot of ages 因烟灰长年累月积累而变黑的石头
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[as adj.
blackened ]she smiled at Mary, revealing blackened teeth. 她朝着玛丽笑，露出发黑的牙齿。
[with obj.]dye or colour (the face or hair) black for camouflage or cosmetic effect
（伪装或化妆时）把（脸或头发）染黑。
[no obj.](of the sky)become dark as night or a storm approaches
（天空）变暗，阴沉下来。
[with obj.]
〈喻〉 诋毁，给（某人）抹黑
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she won't thank you for blackening her husband's name. 你诋毁她的丈夫，她是不会感谢你的。