impervious

/ɪmˈpɜːrviəs/
adjective
  1. Not allowing something to pass through; impermeable.
    • The rock is impervious to water, which is why the lake sits on top of it.
    • The new windows are impervious to heat, keeping the house cool in summer.
    • This jacket is impervious to rain, so you don't need an umbrella.
  2. Not affected or influenced by something; immune.
    • He remained impervious to their teasing and just smiled.
    • She was impervious to fear, walking calmly into the dark room.
    • The company's profits were impervious to the economic downturn.
What does "impervious" mean? | whatsthatwordmean | whatsthatwordmean