Impossible to enter

Usage examples of impenetrable.

Foremost of all, emblazoned at the head of every column, loudest shouted by every triumphant disputant, held up as paramount to all other considerations, stretched like an impenetrable shield to protect the weakest advocate of the great cause against the weapons of the adversary, was that omnipotent monosyllable which has been the patrimony of cheats and the currency of dupes from time immemorial,--Facts!

This novel-and the previous three books in THE FIRST AMERICANS Series-has shown how man first came into the Americas by way of the high Arctic, eventually traversed the upper reaches of the Yukon, penetrated the high passes of the Richardson Mountains, reached the shores of the MacKensie River and-facing the impenetrable mile-high walls of the Cordilleran and Laurentide ice sheets-at last turned south along the eastern spine of the Rocky Mountains and headed straight into the heartland of Ice Age America.

Living, as they did, in what appeared to me impenetrable darkness, their eyes were abnormally large and sensitive, just as are the pupils of the abysmal fishes, and they reflected the light in the same way.

In a harsh land composed largely of shifting desert sand and impenetrable mountains, the concept of landownership among any but the monarch was more ephemeral than it would have been in other parts of the world, where the terrain was more stable.

Lastly, all the masses of impenetrable wood which covered the Serpentine Peninsula were named the forests of the Far West.

Still grinning, he followed the freshest tracks away from the midden, hoping for a sighting, and had gone only half a mile when just beyond the wall of grey impenetrable bush that flanked the narrow trail, there was a sudden hissing, churring outcry of alarm calls and a cloud of brown oxpeckers rose above the scrub.

Once she had identified for him the shapes of the leaves and twigs that denoted edible plants, he was an indefatigable assistant, digging with great patience and concentration through the rockiest and most impenetrable soil.

Then they were behind another boulder the size of a Shoshoni lodge, one of five of similar size forming a crude natural fortification, and they could hear more arrows cracking against the impenetrable stone surfaces.

Due to a certain psychic law, intelligent spirits have the faculty of placing about an ignorant spirit a condition simulating a prison, an impenetrable, cell-like room from which there is no escape.

As she followed the Countess, she often turned her eyes with rapture towards the ocean, seen beneath the dark foliage, far below, and from thence upon the deep woods, whose silence and impenetrable gloom awakened emotions more solemn, but scarcely less delightful.

Vaughn warned Eddie that the glass was of a special thickness and laced with chicken wire, which made it nearly impenetrable.

At every point the assailants found the same scattered but impenetrable fringe of riflemen, and the same energetic batteries waiting for them.

Young carried on a short conversation with Boris Dmitrevich in impenetrable Russian, and then did a spot of translation, looking more worried than I liked.

The picture painted by the documents and interrogations showed that while a number of lower-level systems had been read by German codebreakers, the most important ciphers remained impenetrable.

The near side of the construct formed a tangled, impenetrable fence, twisted exuberantly into arcs and cusps, with shards of galaxy images glittering through the morass of spacetime defects.