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.