Ascertayning or Ascertaining: How To spell?

The word Ascertayning is misspelled against Ascertaining, which is present continuous of "Ascertain"

Word contains consecutive vowels 'AI' in between alphabets ascert & ning is misspelled as 'AY'
Wrong Spelling:  ascert-ay-ning 
Correct Spelling:  ascert-ai-ning 
Find more wrongly spelled words of Ascertaining to spell it well.

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