| The impenetrability of the embodied Gould Concession had its surface shades. |
| But, of course, with his English impenetrability, nobody can tell what he thinks. |
| Until recently, botanists have met with similar impenetrability when asking these questions about orchids, the glamour queens of the plant kingdom. |
| Out of the impenetrability of her first stories, she has created limpidity. |
| Make as few seams as possible, to ensure that maximum root impenetrability is achieved. |
| The main requirement that must be met by these garments is proven impenetrability by hazardous agents through the materials and assemblages. |
