Unfoling or Unfailing: How To spell?

The word Unfoling is misspelled against Unfailing, an adjective meaning "Not failing; not liable to fail; inexhaustible; certain; sure."

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

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