Certeynly or Certainly: How To spell?

The word Certeynly is misspelled against Certainly, an adverb meaning "Without doubt or question; unquestionably."

Word contains consecutive vowels 'AI' in between alphabets cert & nly is misspelled as 'EY'
Wrong Spelling:  cert-ey-nly 
Correct Spelling:  cert-ai-nly 
Explore spell check of Certainly to spell without errors.

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