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Use "porousness" in a sentence
"He is worried by the roadside bombings of the Taliban and the insecurity and "porousness" on the border is a problem, calling for a "new security strategy" which is being discussed at the moment."
"Over the centuries, the porousness of English has enabled it to absorb many thousands of new words from other languages."
"Buyer beware: Some dealers may try to justify the porousness and pockmarks of lower-end stone as naturally occurring imperfections that are a stylistic choice, say contractors."