Definition

1. Noun:
   • Lubricant: A substance, typically oil or grease, applied to surfaces in mutual contact to reduce friction and wear between them. It can also serve to carry away heat or contaminants.
   • Lubricating oil: Specifically refers to oil used for lubrication purposes in machinery, engines, or mechanical parts.

Usage Examples

• Noun:
  • Động cơ xe cần được thay dầu nhờn định kỳ. (The car engine needs its lubricant changed regularly.)
  • Công nhân bôi dầu nhờn vào các bộ phận máy móc. (The worker applies lubricating oil to the machinery parts.)

Advanced Usage

• Technical/Industrial Context: In technical manuals or industrial settings, "dầu nhờn" is a standard term for various grades and types of lubricants, including engine oil, gear oil, and industrial lubricants.
  • Dầu nhờn công nghiệp được sử dụng trong các nhà máy. (Industrial lubricant is used in factories.)

Variants and Related Words

• Dầu bôi trơn: A direct synonym, also meaning "lubricant" or "lubricating oil." This term is often used interchangeably with "dầu nhờn."
• Dầu máy: Literally "machine oil," a common term for engine oil or general-purpose lubricating oil.
• Mỡ bôi trơn: "Lubricating grease," a semi-solid lubricant, related in function but different in form from "dầu nhờn."

Synonyms

• Chất bôi trơn: Lubricant (a more formal or general term for any lubricating substance).
• Dầu mỡ bôi trơn: Oils and greases (a collective term for lubricants).

Related Phrases

• Thay dầu nhờn: To change the lubricant/oil.
  • Đã đến lúc thay dầu nhờn cho xe. (It's time to change the car's oil.)
• Bơm dầu nhờn: To pump lubricant.
  • Hệ thống tự động bơm dầu nhờn. (The system automatically pumps lubricant.)

Notes on Meaning

• The word "dầu nhờn" specifically refers to the substance used for lubrication. It does not refer to crude oil ("dầu mỏ"), cooking oil ("dầu ăn"), or essential oils ("tinh dầu").
• The "nhờn" component implies a slippery, greasy quality, which is the essential characteristic of a lubricant.

1. Lubricant