impervious C1 Topic:Materials & Substances US /ɪmˈpɝ.vi.əs/ UK /ɪmˈpɜːvi.əs/ See IPA manual Freq #30383 Meanings 1 adj Not affected or influenced by something, such as criticism or emotion. He seemed completely impervious to the insults his rivals threw at him. 2 adj Not letting a substance, especially water, pass through. The jacket is made of a material that is impervious to rain. Thesaurus Synonyms 2 adj · not letting a substance,... impermeableimpenetrable ↔ Opposites pervious Word family Derived forms imperviouslyimperviousnessimpervium Etymology AI details From Latin impervius (“that cannot be passed through”), from in- (“not”) + pervius (“letting things through”). Topics Materials & Substances Word Formation & Derivatives External links Cambridge Dictionary Wiktionary Google Images # impervious **Type:** Word **Level:** C1 **Part of speech:** adj **IPA (US):** /ɪmˈpɝ.vi.əs/ **IPA (UK):** /ɪmˈpɜːvi.əs/ **Frequency rank:** 30383 ## Meanings 1. Not affected or influenced by something, such as criticism or emotion. 2. Not letting a substance, especially water, pass through. ## Examples - He seemed completely impervious to the insults his rivals threw at him. - The jacket is made of a material that is impervious to rain. ## Antonyms - pervious ## Derived Forms - imperviously - imperviousness - impervium ## Etymology From Latin impervius (“that cannot be passed through”), from in- (“not”) + pervius (“letting things through”). ## AI Etymology Impervious is from Latin impervius (“that cannot be passed through”), from in- (“not”) + pervius (“letting things through”). In present-day use, it can mean not affected or influenced by something, such as criticism or emotion, or not letting a substance, especially water, pass through. Derived formations include imperviously, imperviousness, and impervium. ## Topics - Materials & Substances - Word Formation & Derivatives markdown