impenetrability
131inviolability — I noun immunity from assault, impenetrability, impregnability, incorruptibility, indestructibility, inexpugnability, inviolableness, invulnerability, protection, safety, sanctitas, security, security against violence, unassailability associated… …
132opacity — I noun asininity, blockishness, confusion, darkness, denseness, density, dimness, doltishness, dull wittedness, dullness, fatuity, hebetude, impenetrability, imperceptibility, inapprehensibility, incomprehensibility, indiscernibility,… …
