Prevoled or Prevailed: How To spell?

The word Prevoled is misspelled against Prevailed, which is past tense of "Prevail"

Word contains consecutive vowels 'AI' in between alphabets prev & led is misspelled as 'O'
Wrong Spelling:  prev-o-led 
Correct Spelling:  prev-ai-led 
Find more incorrect spellings of Prevailed to spell right way.

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