adjective
impenetrable
im-PEN-ih-truh-bul/ɪmˈpenɪtrəbl/
Too resistant to allow entry or passage.
A dense wall of thorny bushes forms an impenetrable barrier.
Etymology
The pieces describe something that cannot be entered or pierced. Applied to meaning rather than matter, the same barrier image describes something the understanding cannot get through.
In context
the impenetrable pale features were there once more, showing neither hate nor fear, nor any feeling or emotion whatever.
More examples
- The fortress has thick, nearly impenetrable walls.
- This coating creates an impenetrable seal against moisture.
- The tangled undergrowth is impenetrable without a machete.
Forms
impenetrable
impenetrability noun — The quality of preventing entry or passage.
Similar words
- impassable
- Describes terrain or routes that cannot be traveled through.
- impermeable
- Specifically prevents liquids or gases from passing through a material.