darken
verb [ I ] uk/ˈdɑː.kən/ us/ˈdɑːr.kən/
变黑，变暗
to become dark
The sky darkened as thick smoke billowed from the blazing oil well. 燃烧的油井冒出滚滚浓烟，天都黑了。
Idiom
not darken someone's dooridiom literary 不要再登…的门;别再回到…地方
used to tell someone to never come back to a place
Never darken my door again! 以后不许再进我的家门！