Learn how to say Imperviously correctly in English with this tutorial pronunciation video.
Oxford dictionary definition of the word impervious:
1not allowing fluid to pass through:
an impervious layer of basaltic clay
2 (impervious to) unable to be affected by:
he worked, apparently impervious to the heat
mid 17th century: from Latin impervius (from in- ‘not’ + pervius ‘pervious’) + -ous: