The word Imperviousnes is misspelled against Imperviousness, meaning "haughty arrogant commanding"
-->
Imperviousness has double 'ss' in the end mispronounced as 's'
Remember double 'SS' appears in the end of this word which should not be misspelled with single 'S'
Wrong Spelling:  imperviousne-s 
Correct Spelling:  imperviousne-ss 
Check more misspelled words of Imperviousness to spell it correct.