The thief tried to use a hostage as a 'human shield'. [=the thief hid behind the hostage so the police would not shoot]
Exercise and good nutrition are a 'shield against' disease. [=exercise and good nutrition protect you from disease]
I think she's 'shielded' her child 'from' the real world for too long.
(..) is protected. And by forces more impenetrable than any army. Observe. Deactivate. Failing the radar shield, the slightest release of pressure in the weight of the diamond... and the would-be thief is a prisoner. A prisoner of (..)1975 The Return of the Pink Panther