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