The word Sufixment is misspelled against Suffixment, a noun meaning "Suffixion."
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Suffixment has double "ff" is mispronounced as "f"
Remember double 'FF' in between the strings Su & ixment which should not be misspelled with single 'F'
Wrong Spelling:  Su-f-ixment 
Correct Spelling:  Su-ff-ixment 
Check more misspelled words of Suffixment to spell it correct.