Engroning or Engraining: How To spell?

The word Engroning is misspelled against Engraining, which is present continuous of "Engrain"

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

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