Breadcrumb Home > Thesaurus > I Cite Synonyms of impenetrability Find synonyms for: Noun1. impenetrability, imperviousness, qualityusage: the quality of being impenetrable (by people or light or missiles etc.)2. impenetrability, impenetrableness, incomprehensibilityusage: incomprehensibility by virtue of being too dense to understandWordNet 3.0 Copyright © 2006 by Princeton University. All rights reserved.Definition and meaning of impenetrability (Dictionary) TrendingHere are the facts and trivia that people are buzzing about. February 2021 Current Events: US News The Berlin Conference and the Partition of Africa The Implied Powers of Congress Noble Titles and Ranks in a Monarchy Keeping Your Brain Active in a COVID-19 World The Manchu Related Content Daily Word Quiz: picayune Analogy of the Day: Today’s Analogy Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language