blacken
verb uk/ˈblæk.ən/ us/ˈblæk.ən/
(MAKE DARK)
[ I or T ]使…变成黑色
to become black or to make something become black
The folds of the curtains were blackened with dirt. 窗帘褶被尘土弄得黑乎乎的。
(SPOIL)
blacken someone's name, image, reputation, etc. 败坏…的名声（形象，声誉等）
to spoil someone's reputation
The financial crash blackened the image of bankers. 金融崩溃破坏了银行家的形象。