To involve in darkness; to shroud with the shades of night; to obscure.

To overtake with night or darkness, especially before the end of a day's journey or task.

To involve in moral darkness, or ignorance; to debar from intellectual light.

overtake with darkness or night

envelop with social, intellectual, or moral darkness; "The benighted peoples of this area"

make difficult to perceive by sight; "The foliage of the huge tree obscures the view of the lake"