AVARANA

Avarana (Sanskrit) [from a-vri to conceal, surround] Covering, hiding, concealing, enclosing; as a noun, the act of enclosing or concealing, also anything that conceals, encloses, or protects, as a wall, shield, or garment. In philosophy, intellectual blindness.
In Vedanta philosophy, avarana-sakti is the power of illusion, that which veils, conceals, or surrounds the real nature of beings or things.