Not well-known.
Dark, faint or indistinct.
Difficult to understand.
Hidden, out of sight or inconspicuous.
Unknown or uncertain; unclear.
To hide, put out of sight etc.
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.
Not well developed.
Not formed or made.
Not having a definite form; shapeless; amorphous.
Not grouped into any constellation.
Decomposed, or resolved into parts; having the form destroyed.