The word Backsliden is misspelled against Backslidden, which is past perfect of "Backslide"
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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.