Inefability or Ineffability: How To spell?
The word Inefability is misspelled against Ineffability, a noun meaning "The quality or state of being ineffable; ineffableness; unspeakableness."
Ineffability has double "ff" is mispronounced as "f"Remember double 'FF' in between the strings Ine & ability which should not be misspelled with single 'F'
Wrong Spelling:  Ine-f-ability  Correct Spelling:  Ine-ff-ability 
Find more wrongly spelled words of Ineffability to spell it well.