Unfulable or Unfailable: How To spell?

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

Word contains consecutive vowels 'AI' in between alphabets unf & lable is misspelled as 'U'
Wrong Spelling:  unf-u-lable 
Correct Spelling:  unf-ai-lable 
Check more misspelled words of Unfailable to spell it correct.

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