Ineficacious or Inefficacious: How To spell?
The word Ineficacious is misspelled against Inefficacious, an adjective meaning "Not efficacious; not having power to produce the effect desired; inadequate; incompetent; inefficient; impotent."
Inefficacious has double "ff" is mispronounced as "f"Remember double 'FF' in between the strings Ine & icacious which should not be misspelled with single 'F'
Wrong Spelling:  Ine-f-icacious  Correct Spelling:  Ine-ff-icacious 
Check more misspelled words of Inefficacious to spell it correct.