Certenly or Certainly: How To spell?
The word Certenly 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 'E'Wrong Spelling:  cert-e-nly  Correct Spelling:  cert-ai-nly 
Explore spell check of Certainly to spell without errors.