undurchdringbar

== German == === Etymology === un- +‎ durchdringbar === Pronunciation === IPA(key): /ʊndʊʁçˈdrɪŋbaːɐ̯/ === Adjective === undurchdringbar (strong nominative masculine singular undurchdringbarer, not comparable) impenetrable, impermeable, impassable, inaccessible ==== Declension ====