Maester or Maister: How To spell?

The word Maester is misspelled against Maister, a noun meaning "Master."

Word contains consecutive vowels 'AI' in between alphabets m & ster is misspelled as 'AE'
Wrong Spelling:  m-ae-ster 
Correct Spelling:  m-ai-ster 
Explore spell check of Maister to spell without errors.

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