The word Undeidly is misspelled against Undeadly, an adjective meaning "Not subject to death; immortal."
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Undeadly has vowels 'ea' together mispronounced as 'ei'
Word contains consecutive vowels 'EA' in between alphabets und & dly is misspelled as 'EI'
Wrong Spelling:  und-ei-dly 
Correct Spelling:  und-ea-dly 
Find more wrongly spelled words of Undeadly to spell it well.