Citations:impenetrable


 * 1818 — Mary Shelley. Frankenstein.
 * Sometimes I endeavoured to gain from Frankenstein the particulars of his creature's formation, but on this point he was impenetrable.


 * 1843 — Charles Dickens. A Christmas Carol.
 * It was not in impenetrable shadow as the other objects in the yard were, but had a dismal light about it, like a bad lobster in a dark cellar.