1. The hallmark of the Big Dig has been its imperviousness to outside control. 2. The Argents list all his supernatural activity and test his imperviousness to fire. 3. Domitian is shaken by their imperviousness to suffering. 4. Arpaio has a plexiglass imperviousness to criticism. 5. But however well it does financially, John Travolta's happy imperviousness is unlikely to be affected. 6. He, in turn, likes the British for their imperviousness to fanaticism and sense of the absurd. 7. The high crosslinking gives this type of phenolic resin its hardness, good thermal stability, and chemical imperviousness . 8. And so it is : Japan's imperviousness to unemployment does indeed involve a bit of make-believe. 9. The Times series dispelled any temptation to be complacent about the American economy's supposed imperviousness to distant trends. 10. However, Cyber's imperviousness and greater strength make that a moot point, as he later explains to Wolverine.