WWordGenerator.org GeneratorsWord ListsBlogAboutGenerate a word Home / I / impenetrability impenetrability noun 15 letters Scrabble 24 WWF 28 Definitions noun incomprehensibility by virtue of being too dense to understand impenetrableness noun the quality of being impenetrable (by people or light or missiles etc.) imperviousness Look “impenetrability” up elsewhere Wiktionary ↗ Merriam-Webster ↗ Etymonline ↗ Dictionary.com ↗ Want another word?Spin the dictionary for a fresh one. Generate a word →