Sufix or Suffix: How To spell?
The word Sufix is misspelled against Suffix, a noun meaning "A letter, letters, syllable, or syllables added or appended to the end of a word or a root to modify the meaning; a postfix."
Suffix has double "ff" is mispronounced as "f"Remember double 'FF' in between the strings Su & ix which should not be misspelled with single 'F'
Wrong Spelling:  Su-f-ix  Correct Spelling:  Su-ff-ix 
Check more misspelled words of Suffix to spell it correct.