Intropresion or Intropression: How To spell?
The word Intropresion is misspelled against Intropression, a noun meaning "Pressure acting within."
Intropression has double "ss" is mispronounced as "s"Remember double 'SS' in between the strings intropre & ion which should not be misspelled with single 'S'
Wrong Spelling:  intropre-s-ion  Correct Spelling:  intropre-ss-ion 
Find more incorrect spellings of Intropression to spell right way.