effectual

Word family  noun effect effectiveness ≠ ineffectiveness adjective effective ≠ ineffective effectual ≠ ineffectual verb effect adverb effectively ≠ ineffectively

 Longman Dictionary of Contemporary English 5++朗文当代英语 5++LDOCE 5++朗文 5++ef·fec·tu·al /ɪˈfektʃuəl/ adjective formal  EFFECTIVEproducing the result that was wanted or intended 有效的，奏效的 SYN effective OPP ineffectual

Examples from the Corpus

effectual• Of course, such prior advertisement of a new law is usually necessary for it to be an effectual deterrent.• The plant was boiled in water and the resulting infusion was said to be an effectual diuretic.• I have yet to learn an effectual protective against the midge.• Have denotes an exercise of authority which is effectual, that is, which ensures the realization of the action commanded.• In all, Barratt considered that an effectual trial on the Bonsor Lode could be made for about £1,000.

ef·fec·tu·al adjectiveChineseSyllable  

that wanted result producing was the or Corpus intended

effectual
ef‧fec‧tu‧al /ɪˈfektʃuəl/ adjective formalproducing the result that was wanted or intended
   SYN  effective
   OPP  ineffectual

ef·fec·tualBrE /ɪˈfektʃuəl/ 🔊NAmE /ɪˈfektʃuəl/ 🔊 adjective (formal) (of things, not people 指物，不指人) producing the result that was intended 有效的；奏效的 SYN effective ◆an effectual remedy有效的疗法  ➡  compare ineffectual ▸ ef·fec·tual·ly BrE /ɪˈfektʃuəli/ 🔊NAmE /ɪˈfektʃuəli/ 🔊 adverb