Impenetrable shell Synonyms

Definitions for Impenetrable


  • (adjective) impossible to get through or into
  • (adjective) being beyond one's powers to know, understand, or explain
  • (adjective) impossible to understand

Definitions for Shell


  • (noun) something that encloses another thing especially to protect it
  • (noun) the arrangement of parts that gives something its basic form
  • (noun) an outer part or layer