To envelop in a protective case.
To withdraw into such a case.
The silky protective case spun by the larvae of some insects in which they metamorphose, the pupa.
Any similar protective case, whether real or metaphorical.
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.
Dark, faint or indistinct.
Difficult to understand.
Not well-known.
Hidden, out of sight or inconspicuous.
Unknown or uncertain; unclear.