Lesen or Lessen: How To spell?
The word Lesen is misspelled against Lessen, an adjective meaning "To make less; to reduce; to make smaller, or fewer; to diminish; to lower; to degrade; as, to lessen a kingdom, or a population; to lessen speed, rank, fortune."
Lessen has double "ss" is mispronounced as "s"Remember double 'SS' in between the strings le & en which should not be misspelled with single 'S'
Wrong Spelling:  le-s-en  Correct Spelling:  le-ss-en 
Explore spell check of Lessen to spell without errors.