Disymmetrical or Dissymmetrical: How To spell?
The word Disymmetrical is misspelled against Dissymmetrical, an adjective meaning "Not having symmetry; asymmetrical; unsymmetrical."
Dissymmetrical has double "ss" is mispronounced as "s"Remember double 'SS' in between the strings di & ymmetrical which should not be misspelled with single 'S'
Wrong Spelling:  di-s-ymmetrical  Correct Spelling:  di-ss-ymmetrical 
Find more wrongly spelled words of Dissymmetrical to spell it well.