Origin of impermeable
Related formsim·per·me·a·bil·i·ty, im·per·me·a·ble·ness, nounim·per·me·a·bly, adverb
Can be confusedimpermeable impervious
Examples from the Web for impermeability
The impermeability of plastic clay to water is a characteristic which is important for many purposes.
It is only when in combination that it exhibits this impermeability to the obscure rays.The Glaciers of the Alps|John Tyndall
The fused portion fills the pores or interstices of the material, making—when cold—a ware of great strength and impermeability.
The integrity and impermeability of this asphalt coat are quite as vital as constant saturation.