Definition

1. Adjective:
   • Efficacious, effective: Describes something (like a method, medicine, or action) that produces a clearly visible, desired, and intended result. It emphasizes proven effectiveness and tangible outcomes.

Usage Examples

• Adjective:
  • Phương pháp điều trị mới này rất hiệu nghiệm. (This new treatment method is very efficacious.)
  • Đó là một bài thuốc hiệu nghiệm được truyền lại nhiều đời. (That is an effective remedy passed down through many generations.)
  • Lời khuyên của anh ấy thật sự hiệu nghiệm. (His advice proved to be truly effective.)

Advanced Usage

• "tính hiệu nghiệm": efficacy, effectiveness (the noun form denoting the quality of being efficacious).
  • Tính hiệu nghiệm của vắc-xin đã được chứng minh. (The vaccine's efficacy has been proven.)
• Often used in formal or medical/technical contexts to describe treatments, methods, or solutions with demonstrable success.

Variants and Related Words

• Hiệu quả (adj/n): effective, effect, result. A more general and common term for effectiveness. "Hiệu nghiệm" often implies a stronger, more proven, or more remarkable level of effectiveness.
• Công hiệu (n): efficacy, potency (often used for medicine).
• Có tác dụng (phrase): to have an effect, to work.

Synonyms

• Có hiệu lực: to be effective, to be in force.
• Có tác dụng tốt: to work well, to have a good effect.

Related Idioms

• "Thuốc đắng dã tật": Literally "Bitter medicine cures sickness." This idiom conveys the idea that effective solutions (like efficacious medicine) are often unpleasant. It relates to the concept of "hiệu nghiệm" in the context of remedies.
  • Phải chấp nhận sự thật, thuốc đắng dã tật mà. (You must accept the truth; it's like bitter medicine that cures.)

adj

1. efficacious