Thesaurus > Related Words: impenetrable

  Words related to impenetrable

Related / Similar Words: dense, heavy

 

Definition:
  • impossible to understand; "impenetrable jargon";
  • not admitting of penetration or passage into or through; "an impenetrable fortress"; "impenetrable rain forests";
  • permitting little if any light to pass through because of denseness of matter; "dense smoke"; "heavy fog"; "impenetrable gloom";

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