The word Knabing is misspelled against Knabbing, which is present continuous of "Knab"
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Knabbing has double "bb" is mispronounced as "b"
Remember double 'BB' in between the strings Kna & ing which should not be misspelled with single 'B'
Wrong Spelling:  Kna-b-ing 
Correct Spelling:  Kna-bb-ing 
Find more wrongly spelled words of Knabbing to spell it well.