Eficacious or Efficacious: How To spell?
The word Eficacious is misspelled against Efficacious, meaning "Effective."
Efficacious has double "ff" is mispronounced as "f"Remember double 'FF' in between the strings E & icacious which should not be misspelled with single 'F'
Wrong Spelling:  E-f-icacious  Correct Spelling:  E-ff-icacious 
Check more misspelled words of Efficacious to spell it correct.