Prexist or Preexist: How To spell?
The word Prexist is misspelled against Preexist, meaning "To exist at a period or in a state earlier than something else."
Preexist has double "ee" is mispronounced as "e"Remember double 'EE' in between the strings Pr & xist which should not be misspelled with single 'E'
Wrong Spelling:  Pr-e-xist  Correct Spelling:  Pr-ee-xist 
Find more wrongly spelled words of Preexist to spell it well.