shroud
Definitions
A length of cloth or an enveloping garment in which a dead person is wrapped for burial.
A thing that surrounds or obscures something, such as a veil of mist or darkness.
To cover or envelop so as to conceal from view.
Examples
A thick fog began to shroud the city, making it difficult to see more than a few feet ahead.
The mystery surrounding the ancient artifact remains hidden under a shroud of secrecy.
Dark clouds gathered to shroud the mountain peak in an ominous grey veil.