blacken
/ˈblækən/verb
1- become or make black or dark, especially as a result of burning, decay, or bruising（使）变黑, 熏黑, （使）变暗：
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
with obj. stone blackened by the soot of ages因烟灰长年累月积累而变黑的石头
as adj. blackened she smiled at Mary, revealing blackened teeth.她朝着玛丽笑, 露出发黑的牙齿。
1.1
- 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。
1.2
- no obj.(of the sky) become dark as night or a storm approaches（天空）变暗, 阴沉下来。
1.3
- with obj. figurative damage or destroy (someone's reputation) by speaking badly of them〈喻〉诋毁, 给（某人）抹黑：
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。