The word Prevaulingly is misspelled against Prevailingly, an adverb meaning "So as to prevail."
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Word contains consecutive vowels 'AI' in between alphabets prev & lingly is misspelled as 'AU'
Wrong Spelling:  prev-au-lingly 
Correct Spelling:  prev-ai-lingly 
Check more misspelled words of Prevailingly to spell it correct.