ef·fec·tu·al
adjective/ɪˈfektʃuəl/
/ɪˈfektʃuəl/
(formal)- (of things, not people) producing the result that was intended
有效的；奏效的 - an effectual remedy
有效的疗法
Word Originlate Middle English: from medieval Latin effectualis, from Latin effectus, from efficere ‘accomplish’, from ex- ‘out, thoroughly’ + facere ‘do, make’. - an effectual remedy