What is another word for Imperforable?
Pronunciation: [ɪmpˈɜːfəɹəbə͡l] (IPA) 
Imperforable means something that cannot be penetrated or pierced. Synonyms for the word include impervious, impenetrable, impregnable, inviolable and indomitable. Impervious refers to something that is resistant to penetration or flow while impenetrable means unable to be entered or penetrated. Impregnable means unable to be captured or defeated while inviolable means that something is not to be violated or is not capable of being damaged. Indomitable means incapable of being subdued or conquered. These synonyms for imperforable can be used in many situations and are useful in expressing something that is impossible to penetrate or invade.
