Impercauvable or Imperceivable: How To spell?

The word Impercauvable is misspelled against Imperceivable, an adjective meaning "Imperceptible."

Word contains consecutive vowels 'EI' in between alphabets imperc & vable is misspelled as 'AU'
Wrong Spelling:  imperc-au-vable 
Correct Spelling:  imperc-ei-vable 
Check more misspelled words of Imperceivable to spell it correct.