1. The quality of being impenetrable (by people or light or missiles etc.)
   - imperviousness 
2. Incomprehensibility by virtue of being too dense to understand
   - impenetrableness

Derived forms: impenetrabilities

See also: impenetrable

Type of: incomprehensibility, quality

Antonym: penetrability

Encyclopedia: Impenetrability

• fibroadenoma
• fibroblast
• fibrocalcific
• fibrocartilage
• fibrocartilaginous
• fibrocystic breast disease
• fibrocystic disease of the breast
• fibrocystic disease of the pancreas
• fibroid
• fibroid tumor
• fibroid tumour
• fibroin
• fibroma
• fibromyalgia
• fibromyositis
• fibrosis
• fibrositis
• fibrosity
• fibrous
• fibrous astrocyte
• fibrous dysplasia of bone
• fibrous joint
• fibrous tissue
• fibrous-rooted begonia
• fibrousness