Asister or Assister: How To spell?
The word Asister is misspelled against Assister, a noun meaning "An assistant; a helper."
Assister has double "ss" is mispronounced as "s"Remember double 'SS' in between the strings a & ister which should not be misspelled with single 'S'
Wrong Spelling:  a-s-ister  Correct Spelling:  a-ss-ister 
Find more wrongly spelled words of Assister to spell it well.