Restroning or Restraining: How To spell?

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

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

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