a. [ L. eficax, -acis, fr. efficere. See Effect, n. ] Possessing the quality of being effective; productive of, or powerful to produce, the effect intended; as, an efficacious law.
(adj) marked by qualities giving the power to produce an intended effect; -Aldous Huxley, Ant.inefficacious, Example: written propaganda is less efficacious than the habits and prejudices...of the readers; the medicine is efficacious in stopping a cough
(adv) in an effective manner, Syn.effectively, Ant.ineffectively, inefficaciously, Example: these are real problems that can be dealt with most effectively by rational discussion
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แสดงได้ทั้งความหมายของคำเดี่ยว และคำผสม ได้อย่างถูกต้อง
เช่น Secretary of State=รัฐมนตรีต่างประเทศของสหรัฐฯ (ในภาพตัวอย่าง),
High school=โรงเรียนมัธยมปลาย