impermeability

impermeability — noun

1. the quality of being so tightly constructed or compact that liquids or gases can

1.名詞C1
釋義

the quality of being so tightly constructed or compact that liquids or gases cannot pass through it

例句

The concrete wall's impermeability was tested under high water pressure for 24 hours.

passive: be tested under pressure for a duration

Jin's geology team studied clay's impermeability to stop pollutants from reaching the groundwater.

impermeability + to + noun (purpose: preventing contamination)

同義詞
  • imperviousness

    very similar; can also describe resistance to ideas or influence in figurative use

  • waterproofness

    informal and narrower — only applies to water, not gases

  • resistance

    broader term; does not specify that nothing passes through, only that it is difficult

反義詞
  • permeability

    the ability of liquids or gases to pass through

  • porosity

    the presence of tiny holes that allow passage, especially in rocks and soils

文法句型

impermeability + to + [substance]

impermeability + of + [material]

用法筆記

Uncountable noun, almost exclusively used in formal, scientific, or technical writing rather than everyday conversation. The substance that cannot pass through is introduced with the preposition 'to': impermeability to water, impermeability to gas.

常見錯誤

❌impermeability for water
✅impermeability to water
💡Use 'to', not 'for', after 'impermeability'.
❌This raincoat has impermeability.
✅This raincoat is impermeable.
💡In everyday contexts, the adjective 'impermeable' is more natural than the noun.