Certeinly or Certainly: How To spell?
The word Certeinly 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 'EI'Wrong Spelling:  cert-ei-nly  Correct Spelling:  cert-ai-nly 
Find more wrongly spelled words of Certainly to spell it well.