Definition

1. Noun:
   • A type of vine (Derris): Refers to a genus of tropical and subtropical leguminous vines, shrubs, or trees. Some species, particularly Derris elliptica, are known for their roots containing rotenone, historically used as a fish poison and insecticide.
   • The vine itself: Can refer to the physical plant, characterized by its climbing habit and compound leaves.

Usage Examples

• Noun:
  • Người dân địa phương từng dùng rễ cây dây mật để đánh bắt cá. (Local people used to use derris root to catch fish.)
  • Dây mật là một loại dây leo thường thấy ở vùng nhiệt đới. (Derris is a type of vine commonly seen in tropical regions.)

Advanced Usage

• "rễ dây mật" (derris root): Specifically refers to the root of the plant, which contains the active compounds.
  • Rễ dây mật được phơi khô và nghiền thành bột để sử dụng. (Derris root is dried and ground into powder for use.)

Variants and Related Words

• Thuốc cá (fish poison): A common name for the prepared substance from derris root used traditionally for fishing.
• Cây thuốc cá (fish poison plant): Another vernacular name for the derris plant.
• Rotenone: The English term for the active insecticidal compound found in derris root.

Synonyms

• Dây thuốc cá: Literally "fish poison vine," a direct synonym in Vietnamese.
• Derris: The direct English/Latin botanical name.

Related Phrases

• Bột dây mật (derris powder): The powdered form of the root.
  • Bột dây mật được rắc xuống nước để làm cá tê liệt. (Derris powder is sprinkled into water to paralyze fish.)

Related Idioms

Note: "Dây mật" is a specific botanical term and is not commonly used in Vietnamese idioms. Its usage is primarily technical or related to traditional practices.