Unfolable or Unfailable: How To spell?

The word Unfolable is misspelled against Unfailable, an adjective meaning "Infallible."

Word contains consecutive vowels 'AI' in between alphabets unf & lable is misspelled as 'O'
Wrong Spelling:  unf-o-lable 
Correct Spelling:  unf-ai-lable 
Find more incorrect spellings of Unfailable to spell right way.

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