Undecive or Undeceive: How To spell?

The word Undecive is misspelled against Undeceive, meaning "To free from deception, as by apprising of the real state of affairs."

Word contains consecutive vowels 'EI' in between alphabets undec & ve is misspelled as 'I' as letter 'E' is phonetically ignore
Wrong Spelling:  undec-i-ve 
Correct Spelling:  undec-ei-ve 
Find more wrongly spelled words of Undeceive to spell it well.