Definitions for "Impenetrable"
Incapable of being penetrated or pierced; not admitting the passage of other bodies; not to be entered; impervious; as, an impenetrable shield.
Not capable of being penetrated or entered (as a penguin's feathers are to water)
not admitting of penetration or passage into or through; "an impenetrable fortress"; "impenetrable rain forests"
Inaccessible, as to knowledge, reason, sympathy, etc.; unimpressible; not to be moved by arguments or motives; as, an impenetrable mind, or heart.
Term applied historically to the area of the dry chaco with the most inhospitable conditions for white settlement, due to lack of water; the name of a zone of northwestern Chaco Province.
Keywords:  gloom, fog, dense, smoke, heavy
permitting little if any light to pass through because of denseness of matter; "dense smoke"; "heavy fog"; "impenetrable gloom"
Having the property of preventing any other substance from occupying the same space at the same time.
Keywords:  get
Cannot get through.