Unesessary or Unnesessary: How To spell?
The word Unesessary is misspelled against Unnesessary, an adjective meaning "Not necessary; not required under the circumstances; unless; needless; as, unnecessary labor, care, or rigor."
Unnesessary has double "nn" is mispronounced as "n"Remember double 'NN' in between the strings u & esessary which should not be misspelled with single 'N'
Wrong Spelling:  u-n-esessary  Correct Spelling:  u-nn-esessary 
Explore spell check of Unnesessary to spell without errors.