a. [ L. impervius; pref. im- not + per through + via way. See Voyage. ] Not pervious; not admitting of entrance or passage through;
This gulf impassable, impervious. Milton. [ 1913 Webster ]
The minds of these zealots were absolutely impervious. Macaulay.
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a. [ L. pervis; per + via a way. See Per-, and Voyage. ]
[ Doors ] . . . pervious to winds, and open every way. Pope. [ 1913 Webster ]
God, whose secrets are pervious to no eye. Jer. Taylor. [ 1913 Webster ]
n. The quality or state of being pervious;