单词：effectual 

形容词

• 
  [1.a.effectual] (同义词:[effective( adj. 有效的, 被实施的, 给人深刻印象, 有生力量 )]  [effectual( adj. 奏效的, 有效的 )]  [efficacious( adj. 有效的, 灵验的 )]  )
• 
  注释列句：producing or capable of producing an intended result or having a striking effect; "an air-cooled motor was more effective than a witch's broomstick for rapid long-distance transportation"-LewisMumford; "effective teaching methods"; "effective steps toward peace"; "made an effective entrance"; "his complaint proved to be effectual in bringing action"; "an efficacious law"
• 另 外 -> [efficacious( adj. 有效的, 灵验的 )]  [efficient( adj. (直接)生效的, 有效率的, 能干的 )]  [potent( adj. 有力的, 有效的 )]  [powerful( adj. 强大的, 有力的 )]  [useful( adj. 有用的, 有益的, 有帮手的 )] 
  属 性 -> [effectiveness( n. 效力 )] 
  近义词 -> [hard-hitting( adj. 用力打击的, 能用力打击的 )]  [impelling( adj. 迫使性的,强有力的 )]  [impressive( adj. 给人深刻印象的, 感人的 )]  [rough-and-ready(adj.潦草的 )] 
  派生词 -> [effectualness]  [effectuality] 
  
• 
  [2.a.effectual] (同义词:[legal( adj. 法律的, 法定的, 合法 )]  [sound( n. 声音, 语音, 噪音, 吵闹, 海峡, 听力范围, 探条 adj. 健全的, 可靠的, 合理的, 有效彻底的, 健康的 adv. 彻底地, 充分地 vi. 发出声音, 回响, 测深, 听起来 vt. 使发声, 宣告, 听诊, 测...深, 试探 )]  [effectual( adj. 奏效的, 有效的 )]  )
• 
  注释列句：having legal efficacy or force; "a sound title to the property"
• 近义词 -> [valid( adj. [律]有效的, 有根据的, 正当的, 正确的 )]