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Impervious vs. Impermeable — What's the Difference?

Difference Between Impervious and Impermeable

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Definitions

Impervious

Not allowing fluid to pass through
An impervious layer of basaltic clay

Impermeable

Impossible to permeate
An impermeable membrane.
An impermeable border.

Impervious

Unable to be affected by
He worked, apparently impervious to the heat

Impermeable

Impossible to permeate.

Impervious

Incapable of being penetrated
A material impervious to water.

Impermeable

Not allowing passage, especially of liquids; waterproof.
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Impervious

Incapable of being affected
Impervious to fear.

Impermeable

Not permeable; not permitting passage, as of a fluid. through its substance; impervious; impenetrable; as, India rubber is impermeable to water and to air.

Impervious

Unaffected or unable to be affected by something.
The man was completely impervious to the deception we were trying.

Impermeable

Preventing especially liquids to pass or diffuse through;
Impermeable stone
An impermeable layer of scum
A coat impermeable to rain

Impervious

Preventive of any penetration; impenetrable, impermeable, particularly of water.
Although patchworked and sagging, the roof proved impervious to the weather.

Impervious

Immune to damage or effect.
The old car seemed to be impervious to the wear and tear of age.
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Impervious

Not pervious; not admitting of entrance or passage through; as, a substance impervious to water or air.
This gulf impassable, impervious.
The minds of these zealots were absolutely impervious.

Impervious

Not admitting of passage or capable of being affected;
A material impervious to water
Someone impervious to argument

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