Pesimism or Pessimism: How To spell?
The word Pesimism is misspelled against Pessimism, a noun meaning "A disposition to take the least hopeful view of things."
Pessimism has double "ss" is mispronounced as "s"Remember double 'SS' in between the strings pe & imism which should not be misspelled with single 'S'
Wrong Spelling:  pe-s-imism  Correct Spelling:  pe-ss-imism 
Find more wrongly spelled words of Pessimism to spell it well.