Words similar to impenetrable

Example sentences for: impenetrable

How can you use “impenetrable” in a sentence? Here are some example sentences to help you improve your vocabulary:

Forman and his colleagues present the Andy Kaufman mystery as if they thought it was utterly impenetrable" (Joe Morgenstern, the Wall Street Journal ), or as Janet Maslin writes in the New York Times , "what is missing here, though it might have been the first thing expected from an ostensible film biography, is an answer to the simplest question: Who was Andy Kaufman, and how did he get that way?"
Yet, while the garrulous gabble continues everywhere, constant and unabated, writing still eludes half the world's population for whom marks on any medium remain inscrutable, impenetrable, indecipherable cryptography.
He stands accused of authoring an impenetrable screed titled Industrial Society and Its Future , and of building bombs.
Soon, huge slabs of reinforced concrete and tank-traps formed a more impenetrable barrier.
His Southern accent is so impenetrable that during his short-lived but entertaining 1984 presidential run, he was introduced by Ted Kennedy as "the first non-English speaking candidate for president."