Impasibility or Impassibility: How To spell?
The word Impasibility is misspelled against Impassibility, an adjective meaning "The quality or condition of being impassible; insusceptibility of injury from external things."
Impassibility has double "ss" is mispronounced as "s"Remember double 'SS' in between the strings impa & ibility which should not be misspelled with single 'S'
Wrong Spelling:  impa-s-ibility  Correct Spelling:  impa-ss-ibility 
Find more wrongly spelled words of Impassibility to spell it well.