Inefervescence or Ineffervescence: How To spell?
The word Inefervescence is misspelled against Ineffervescence, a noun meaning "Want of effervescence."
Ineffervescence has double "ff" is mispronounced as "f"Remember double 'FF' in between the strings Ine & ervescence which should not be misspelled with single 'F'
Wrong Spelling:  Ine-f-ervescence  Correct Spelling:  Ine-ff-ervescence 
Explore spell check of Ineffervescence to spell without errors.