Impenetrable citadel 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 Citadel


  • (noun) a structure or place from which one can resist attack
  • (noun) a stronghold into which people could go for shelter during a battle