The word Mistret is misspelled against Mistreat, a verb meaning "To treat amiss; to abuse."
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Mistreat has vowels 'ea' together mispronounced as 'e'
Word contains consecutive vowels 'EA' in between alphabets mistr & t is misspelled as 'E'
Wrong Spelling:  mistr-e-t 
Correct Spelling:  mistr-ea-t 
Find more wrongly spelled words of Mistreat to spell it well.