Shielding / Deshielding

"Shielding" means sending ZEC from a transparent address into a shielded address, moving it into the private shielded pool. "Deshielding" is the reverse — moving ZEC from a shielded address back out to a transparent one, which reveals the amount involved (though not necessarily the shielded sender's other activity).

Because exchanges often only support transparent addresses, a common pattern is to receive ZEC transparently and then shield it immediately into your own private address.