Ingrining or Ingraining: How To spell?

The word Ingrining is misspelled against Ingraining, which is present continuous of "Ingrain"

Word contains consecutive vowels 'AI' in between alphabets ingr & ning is misspelled as 'I'
Wrong Spelling:  ingr-i-ning 
Correct Spelling:  ingr-ai-ning 
Find more wrongly spelled words of Ingraining to spell it well.

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