1. (Of a substance) Allowing water to pass through; permeable.
"David realized how pervious his hiking boots were as soon as he stepped in the river."
"Pervious soil is crucial for ground-dwelling organisms that require water."
"The children's sandcastle was completely pervious; water had already washed it away by the next morning."
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Latin, early 17th century
If this word sounds familiar, you're likely better acquainted with its antonym "impervious." "Pervious," which predates its opposite, comes from the Latin word "pervius" ("having a passage through"). Pervious membranes are crucial for most organic, living things — humans, for example, could not survive without the permeable cells that make up our bodily systems. ...
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