The word Steilthily is misspelled against Stealthily, an adverb meaning "In a stealthy manner."
-->
Stealthily has vowels 'ea' together mispronounced as 'ei'
Word contains consecutive vowels 'EA' in between alphabets st & lthily is misspelled as 'EI'
Wrong Spelling:  st-ei-lthily 
Correct Spelling:  st-ea-lthily 
Find more wrongly spelled words of Stealthily to spell it well.