Yelowing or Yellowing: How To spell?
The word Yelowing is misspelled against Yellowing, a noun meaning "The act or process of making yellow."
Yellowing has double "ll" is mispronounced as "l"Remember double 'LL' in between the strings ye & owing which should not be misspelled with single 'L'
Wrong Spelling:  ye-l-owing  Correct Spelling:  ye-ll-owing 
Find more incorrect spellings of Yellowing to spell right way.