Take the following as truth: Feckless ' spiritless, helpless, futile 'is given in all my desk dictionaries, but only Chambers has feck (nice to see a lost positive found), which comes from effect through vowel-loss and is defined as  efficacy  or  quality. 
Then the following statement: "The word effect originates from the word feck through vowel-loss." is true, false, or inconclusive?
Answer: True