Lesener or Lessener: How To spell?
The word Lesener is misspelled against Lessener, a noun meaning "One who, or that which, lessens."
Lessener has double "ss" is mispronounced as "s"Remember double 'SS' in between the strings le & ener which should not be misspelled with single 'S'
Wrong Spelling:  le-s-ener  Correct Spelling:  le-ss-ener 
Explore spell check of Lessener to spell without errors.