--> Ineffectiveness has double "ff" is mispronounced as "f"
Remember double 'FF' in between the strings Ine & ectiveness which should not be misspelled with single 'F'
Wrong Spelling:  Ine-f-ectiveness 
Correct Spelling:  Ine-ff-ectiveness 
Find more wrongly spelled words of Ineffectiveness to spell it well.