Prexamining or Preexamining: How To spell?
The word Prexamining is misspelled against Preexamining, which is present continuous of "Preexamine"
Preexamining has double "ee" is mispronounced as "e"Remember double 'EE' in between the strings Pr & xamining which should not be misspelled with single 'E'
Wrong Spelling:  Pr-e-xamining  Correct Spelling:  Pr-ee-xamining 
Find more wrongly spelled words of Preexamining to spell it well.