Susteyning or Sustaining: How To spell?
The word Susteyning is misspelled against Sustaining, which is present continuous of "Sustain"
Word contains consecutive vowels 'AI' in between alphabets sust & ning is misspelled as 'EY'Wrong Spelling:  sust-ey-ning  Correct Spelling:  sust-ai-ning 
Check more misspelled words of Sustaining to spell it correct.