Asai or Assai: How To spell?
The word Asai is misspelled against Assai, a noun meaning "A direction equivalent to very; as, adagio assai, very slow."
Assai has double "ss" is mispronounced as "s"Remember double 'SS' in between the strings a & ai which should not be misspelled with single 'S'
Wrong Spelling:  a-s-ai  Correct Spelling:  a-ss-ai 
Find more wrongly spelled words of Assai to spell it well.