Improgresive or Improgressive: How To spell?
The word Improgresive is misspelled against Improgressive, an adjective meaning "Not progressive."
Improgressive has double "ss" is mispronounced as "s"Remember double 'SS' in between the strings improgre & ive which should not be misspelled with single 'S'
Wrong Spelling:  improgre-s-ive  Correct Spelling:  improgre-ss-ive 
Find more incorrect spellings of Improgressive to spell right way.