Unnesesary or Unnesessary: How To spell?
The word Unnesesary 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 "ss" is mispronounced as "s"Remember double 'SS' in between the strings unnese & ary which should not be misspelled with single 'S'
Wrong Spelling:  unnese-s-ary  Correct Spelling:  unnese-ss-ary 
Explore spell check of Unnesessary to spell without errors.