Monprised or Mainprised: How To spell?

The word Monprised is misspelled against Mainprised, which is past tense of "Mainprise"

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

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