Definition of effectual adjective from the Oxford Advanced American Dictionary

     

    effectual

     adjective
    adjective
    NAmE//ɪˈfɛktʃuəl//
     
    (formal)
     
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  1. 1(of things, not people) producing the result that was intended synonym effective
  2. 2 an effectual remedy compare ineffectual
effectually
 
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adverb
See the Oxford Advanced Learner's Dictionary entry: effectual