The word Disyllabify is misspelled against Dissyllabify, a verb meaning "To form into two syllables."
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Dissyllabify has double "ss" is mispronounced as "s"
Remember double 'SS' in between the strings di & yllabify which should not be misspelled with single 'S'
Wrong Spelling:  di-s-yllabify 
Correct Spelling:  di-ss-yllabify 
Find more wrongly spelled words of Dissyllabify to spell it well.