Asistive or Assistive: How To spell?
The word Asistive is misspelled against Assistive, an adjective meaning "Lending aid, helping."
Assistive has double "ss" is mispronounced as "s"Remember double 'SS' in between the strings a & istive which should not be misspelled with single 'S'
Wrong Spelling:  a-s-istive  Correct Spelling:  a-ss-istive 
Find more wrongly spelled words of Assistive to spell it well.