dark; dim; having very little light; dull in color

hidden; secret; not made public; done in private without others knowing

to turn dark; to become dim or obscure (of the sky, a room, etc.)

(literary) confused; muddled; lacking in understanding or wisdom

a Chinese surname

(literary) to close a door

(literary) to be well-acquainted with; to know well; to be familiar with

(literary) evening; nightfall; dusk

(literary) to cover up; to eclipse; to be submerged or lost to history