| Except for a few hundred in bills, everything was locked in the impenetrable safe. |
| Not only can these techniques represent a usability issue to able bodied users they can present an impenetrable barrier to less abled visitors. |
| The Supreme Court decisions that he attacks are written in difficult, if not impenetrable, legalese. |
| Those who mistake the inborn shyness of English people for an impenetrable reserve should visit it. |
| And without a commentary, The Zohar really is an impenetrable text, because of the symbolism that appears in almost every line. |
| Film strips hung from the cutter's rack, bits and pieces of Utah, out-takes overexposed and underexposed, masses of impenetrable material. |
