1. The quality of being impenetrable (by people or light or missiles etc.)
   - impenetrability

Derived forms: imperviousnesses

See also: impervious

Type of: quality

Antonym: perviousness

• jetsam
• jetting
• jettison
• jetty
• jeu d'esprit
• jeune fille
• Jevons
• Jew
• jew's harp
• Jew's-ear
• Jew's-ears
• Jew-baiter
• Jew-bush
• jewel
• jewel casket
• jewel orchid
• jeweled
• false dragonhead
• false face
• false flax
• false foxglove
• false friend
• false fruit
• false garlic
• false gavial