Noun: impenetrability im,pe-ni-tru'bi-li-tee
- The quality of being impenetrable (by people, light or missiles etc.)
"The impenetrability of the safe to drilling attempts foiled the burglars";
- imperviousness
- Incomprehensibility by virtue of being too dense to understand
"The impenetrability of the academic paper discouraged many readers";
- impenetrableness
Derived forms: impenetrabilities
Type of: incomprehensibility, quality
Antonym: penetrability
Encyclopedia: Impenetrability