Necesary or Necessary: How To spell?
The word Necesary is misspelled against Necessary, a noun meaning "A privy; a water-closet."
Necessary has double "ss" is mispronounced as "s"Remember double 'SS' in between the strings nece & ary which should not be misspelled with single 'S'
Wrong Spelling:  nece-s-ary  Correct Spelling:  nece-ss-ary 
Explore spell check of Necessary to spell without errors.