動(dòng)詞 blacken:

1. make or become black
   同義詞：melanize, melanise, nigrify, black
2. burn slightly and superficially so as to affect color
   同義詞：char, sear, scorch

1. The smoke had blackened the white walls of the kitchen.
   煙把廚房白色的墻壁熏黑了。
2. The sky blackened.
   天空變得一片漆黑。

black.en

v.（動(dòng)詞）
black.ened,black.en.ing,black.ens
v.tr.（及物動(dòng)詞）
To make black.
變黑
To sully or defame:
玷污或誹謗：
例句：
a scandal that blackened the mayor`s name.
一件玷污了市長(zhǎng)名聲的丑聞

To coat (fish or meat, for example) with pepper and other spices and then sear in a hot skillet, thereby producing meat that is black on the outside but tender on the inside.
香黑煎肉：用胡椒或其他香料涂抹（魚(yú)或肉）然后在熱平底煎鍋上煎炸，制出外黑內(nèi)軟的肉
v.intr.（不及物動(dòng)詞）
To become dark or black:
變暗或黑：
例句：
The day blackened into night.
夜幕降臨

【引伸】
black.ener
n.（名詞）