Discusing or Discussing: How To spell?
The word Discusing is misspelled against Discussing, which is present continuous of "Discuss"
Discussing has double "ss" is mispronounced as "s"Remember double 'SS' in between the strings discu & ing which should not be misspelled with single 'S'
Wrong Spelling:  discu-s-ing  Correct Spelling:  discu-ss-ing 
Check more misspelled words of Discussing to spell it correct.