mantle

mantle [ MAN-tl ]
[ noun, intransitive verb, transitive verb ]

MEANING :
1. (n.) a cloak or loose sleeveless cape
2. (n.) anything that conceals or covers or envelops
3. (tr. v.) to conceal or cover or envelop
4. (intr. v.) to become covered or spread over

USAGE EXAMPLE 1 :
The final trick was the disappearing act in which the magician covered a volunteer with his mantle and made her vanish.
USAGE EXAMPLE 2 :
Ganymede's ocean is probably deeper beneath the surface, not in direct contact with the rocky mantle.