Harnesing or Harnessing: How To spell?
The word Harnesing is misspelled against Harnessing, which is present continuous of "Harness"
Harnessing has double "ss" is mispronounced as "s"Remember double 'SS' in between the strings harne & ing which should not be misspelled with single 'S'
Wrong Spelling:  harne-s-ing  Correct Spelling:  harne-ss-ing 
Find more wrongly spelled words of Harnessing to spell it well.