3 Sentences With "most impervious"

How to use most impervious in a sentence? Find typical usage patterns (collocations)/phrases/context for "most impervious" and check conjugation/comparative form for "most impervious". Mastering all the usages of "most impervious" from sentence examples published by news publications.

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But in more conservative communities, family pressures can be the first, and most impervious roadblock — and the decision to pursue a career reframed as selfish and improper. from Refinery 29
Border crossing numbers have been historically low and a study from the Department of Homeland Security last fall determined the border was at its most secure and most impervious to illegal immigration point in history -- though numbers released by the DHS late Wednesday showed a sudden spike in attempted crossings last month. from CNN
One of the paths leads to the ovule Piddi, meaning Mandragora or Mandrake in Sards; this poisonous plant grows all over the Supramonte. Helped by the locals, Verin and Cicalò built a network of mule tracks that, with a series of bends, pass through the most impervious gullies and lead to the sea, which can be seen only in Cala Sisine; here there are docks built to transport charcoal and woods. From Cala Sisine it is possible to return to the starting point by the sea with an inflatable boat or by land with a SUV.