Redening or Reddening: How To spell?
The word Redening is misspelled against Reddening, which is present continuous of "Redden"
Reddening has double "dd" is mispronounced as "d"Remember double 'DD' in between the strings Re & ening which should not be misspelled with single 'D'
Wrong Spelling:  Re-d-ening  Correct Spelling:  Re-dd-ening 
Find more wrongly spelled words of Reddening to spell it well.