The word Intropresion is misspelled against Intropression, a noun meaning "Pressure acting within."
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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.