impermeability

/ɪmˌpɜːrmiəˈbɪləti/
noun
  1. The quality of not allowing liquids or gases to pass through.
    • Geologists study the impermeability of rock layers to predict groundwater flow.
    • The impermeability of the plastic sheet kept the rain off the woodpile.
    • The jacket's impermeability makes it perfect for hiking in wet weather.
What does "impermeability" mean? | whatsthatwordmean | whatsthatwordmean