The word Percusing is misspelled against Percussing, which is present continuous of "Percuss"
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Percussing has double "ss" is mispronounced as "s"
Remember double 'SS' in between the strings percu & ing which should not be misspelled with single 'S'
Wrong Spelling: percu-s-ing
Correct Spelling: percu-ss-ing
Check more misspelled words of Percussing to spell it correct.