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1. Oxford American Dictionary

   effectual

   • IPA[əˈfek(t)SH(əw)əl]

   美式

   • adj.
     (of something inanimate or abstract) successful in producing a desired or intended result; effective
2. • 釋義

   adj.

   形容詞

   • 1. (of something inanimate or abstract) successful in producing a desired or intended result; effective tobacco smoke is the most effectual protection against the mosquito 同義詞 effective, successful, efficacious, productive, constructive, ... 更多fruitful, potent, powerful, worthwhile, helpful, of help, of assistance, beneficial, advantageous, valuable, useful, of use反義詞 ineffectual