Unbyeng or Unbeing: How To spell?

The word Unbyeng is misspelled against Unbeing, an adjective meaning "Not existing."

Word contains consecutive vowels 'EI' in between alphabets unb & ng is misspelled as 'YE'
Wrong Spelling:  unb-ye-ng 
Correct Spelling:  unb-ei-ng 
Explore spell check of Unbeing to spell without errors.