Indefeesible or Indefeisible: How To spell?

The word Indefeesible is misspelled against Indefeisible, an adjective meaning "Indefeasible."

Word contains consecutive vowels 'EI' in between alphabets indef & sible is misspelled as 'EE'
Wrong Spelling:  indef-ee-sible 
Correct Spelling:  indef-ei-sible 
Find more wrongly spelled words of Indefeisible to spell it well.