impenetrabilityUK:**UK and possibly other pronunciationsUK and possibly other pronunciations/ɪmˌpenɪtrəˈbɪlɪtɪ/ US:USA pronunciation: IPAUSA pronunciation: IPA/ɪmˌpɛnɪtrəˈbɪlɪti/ US:USA pronunciation: respellingUSA pronunciation: respelling(im pen′i trə bil′i tē, im′pen-)
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