impermeable

im·per·me·a·ble  (m-pûrm--bl)

adj.

Impossible to permeate: an impermeable membrane; an impermeable border.

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im·perme·a·bili·ty, im·perme·a·ble·ness n.

im·perme·a·bly adv.

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impermeable

Adjective

(of a substance) not allowing fluid to pass through: an impermeable layer

impermeability n

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impermeable  (m-pûrm--bl)

Relating to a material through which substances, such as liquids or gases, cannot pass. Some substances, such as some types of contact lenses, are permeable to gas but impermeable to liquid.

Thesaurus

Adj.

1.

impermeable - preventing especially liquids to pass or diffuse through; "impermeable stone"; "an impermeable layer of scum"; "a coat impermeable to rain" tight - of such close construction as to be impermeable; "a tight roof"; "warm in our tight little house" imperviable, impervious - not admitting of passage or capable of being affected; "a material impervious to water"; "someone impervious to argument" permeable - allowing fluids or gases to pass or diffuse through; "permeable membranes"; "rock that is permeable by water"