Approsing or Appraising: How To spell?

The word Approsing is misspelled against Appraising, which is present continuous of "Appraise"

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

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