Unfeulable or Unfailable: How To spell?

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

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

You might be interested to know

Villeuny or Villainy?

Welldreuned or Welldrained?

Apeyd or Apaid?