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Impossible to permeate: an impermeable membrane; an impermeable border.
im·per′me·a·bil′i·ty, im·per′me·a·ble·ness n.
(Chemistry) (of a substance) not allowing the passage of a fluid through interstices; not permeable
imˌpermeaˈbility, imˈpermeableness n
im•per•me•a•ble(ɪmˈpɜr mi ə bəl)
1. not permeable; impassable.
2. (of porous substances, rocks, etc.) not permitting the passage of a fluid.
[1690–1700; < Late Latin]
im•per`me•a•bil′i•ty, im•per′me•a•ble•ness, n.
Relating to a material through which substances, such as liquids or gases, cannot pass: an impermeable cell wall.
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|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"