Dark, faint or indistinct.
Hidden, out of sight or inconspicuous.
Difficult to understand.
Not well-known.
Unknown or uncertain; unclear.
To render obscure; to darken; to make dim; to keep in the dark; to hide; to make less visible, intelligible, legible, glorious, beautiful, or illustrious.
To hide, put out of sight etc.
To conceal oneself; to hide.
Having an absolute or (more often) relative lack of light.
Extinguished.
Dull or deeper in hue; not bright or light.
Hidden, secret, obscure.
Deprived of sight; blind.
Not clear to the understanding; not easily through; obscure; mysterious; hidden.
Without moral or spiritual light; sinister, malign.
Conducive to hopelessness; depressing or bleak.
Lacking progress in science or the arts; said of a time period.
With emphasis placed on the unpleasant aspects of life; said of a work of fiction, a work of nonfiction presented in narrative form or a portion of either.
A complete or (more often) partial absence of light.
Ignorance.
Nightfall.
A dark shade or dark passage in a painting, engraving, etc.
To grow or become dark, darken.
To remain in the dark, lurk, lie hidden or concealed.
To make dark, darken; to obscure.