The word Drubing is misspelled against Drubbing, which is present continuous of "Drub"
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Drubbing has double "bb" is mispronounced as "b"
Remember double 'BB' in between the strings Dru & ing which should not be misspelled with single 'B'
Wrong Spelling: Dru-b-ing
Correct Spelling: Dru-bb-ing
Check more misspelled words of Drubbing to spell it correct.