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Definition of Imperviousness
1. Noun. The quality of being impenetrable (by people or light or missiles etc.).
Exact synonyms: Impenetrability
Generic synonyms: Quality
Derivative terms: Impenetrable, Impervious
Antonyms: Penetrability, Perviousness
Generic synonyms: Quality
Derivative terms: Impenetrable, Impervious
Antonyms: Penetrability, Perviousness
Definition of Imperviousness
1. [n -ES]