Fisile or Fissile: How To spell?
The word Fisile is misspelled against Fissile, an adjective meaning "Capable of being split, cleft, or divided in the direction of the grain, like wood, or along natural planes of cleavage, like crystals."
Fissile has double "ss" is mispronounced as "s"Remember double 'SS' in between the strings fi & ile which should not be misspelled with single 'S'
Wrong Spelling:  fi-s-ile  Correct Spelling:  fi-ss-ile 
Find more wrongly spelled words of Fissile to spell it well.