The word Sufixed is misspelled against Suffixed, which is past tense of "Suffix"
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Suffixed has double "ff" is mispronounced as "f"
Remember double 'FF' in between the strings Su & ixed which should not be misspelled with single 'F'
Wrong Spelling:  Su-f-ixed 
Correct Spelling:  Su-ff-ixed 
Check more misspelled words of Suffixed to spell it correct.