Prexistence or Preexistence: How To spell?
The word Prexistence is misspelled against Preexistence, meaning "Existence antecedent to something."
Preexistence has double "ee" is mispronounced as "e"Remember double 'EE' in between the strings Pr & xistence which should not be misspelled with single 'E'
Wrong Spelling:  Pr-e-xistence  Correct Spelling:  Pr-ee-xistence 
Find more wrongly spelled words of Preexistence to spell it well.