Backsliden or Backslidden: How To spell?
The word Backsliden is misspelled against Backslidden, which is past perfect of "Backslide"
Backslidden has double "dd" is mispronounced as "d"Remember double 'DD' in between the strings Backsli & en which should not be misspelled with single 'D'
Wrong Spelling:  Backsli-d-en  Correct Spelling:  Backsli-dd-en 
Find more wrongly spelled words of Backslidden to spell it well.