The word Traeding is misspelled against Treading, which is present continuous of "Tread"
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Treading has vowels 'ea' together mispronounced as 'ae'
Word contains consecutive vowels 'EA' in between alphabets tr & ding is misspelled as 'AE'
Wrong Spelling:  tr-ae-ding 
Correct Spelling:  tr-ea-ding 
Find more wrongly spelled words of Treading to spell it well.