Restraning or Restraining: How To spell?

The word Restraning is misspelled against Restraining, which is present continuous of "Restrain"

Word contains consecutive vowels 'AI' in between alphabets restr & ning is misspelled as 'A'
Wrong Spelling:  restr-a-ning 
Correct Spelling:  restr-ai-ning 
Find more wrongly spelled words of Restraining to spell it well.

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