Rebufing or Rebuffing: How To spell?
The word Rebufing is misspelled against Rebuffing, which is present continuous of "Rebuff"
Rebuffing has double "ff" is mispronounced as "f"Remember double 'FF' in between the strings Rebu & ing which should not be misspelled with single 'F'
Wrong Spelling:  Rebu-f-ing  Correct Spelling:  Rebu-ff-ing 
Check more misspelled words of Rebuffing to spell it correct.