Refruning or Refraining: How To spell?

The word Refruning is misspelled against Refraining, which is present continuous of "Refrain"

Word contains consecutive vowels 'AI' in between alphabets refr & ning is misspelled as 'U'
Wrong Spelling:  refr-u-ning 
Correct Spelling:  refr-ai-ning 
Check more misspelled words of Refraining to spell it correct.

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