Deman or Demean: How To spell?

The word Deman is misspelled against Demean, a noun meaning "Demesne."

Demean has vowels 'ea' together mispronounced as 'a'
Word contains consecutive vowels 'EA' in between alphabets dem & n is misspelled as 'A'
Wrong Spelling:  dem-a-n 
Correct Spelling:  dem-ea-n 
Explore spell check of Demean to spell without errors.

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