Definition

1. Noun (Geography/Geology):

   • Fault: A fracture or zone of fractures in the Earth's crust along which there has been displacement of the rock masses on either side.

2. Verb (Mechanical Engineering):

   • To mill: To machine a surface, metal, or other material using a rotating cutting tool (a milling cutter or fraise) to remove material.

3. Adjective (Culinary, Northern Vietnamese dialect):

   • Parboiled / Blanched: Referring to meat, especially pork, that has been briefly boiled in water until partially or fully cooked.

Usage Examples

• Noun (Geography):

  • Động đất thường xảy ra dọc theo các đứt gãy địa chất, hay còn gọi là phay. (Earthquakes often occur along geological fractures, also known as faults.)

• Verb (Engineering):

  • Người thợ đang phay một rãnh trên bề mặt kim loại. (The worker is milling a groove on the metal surface.)
  • Chi tiết này cần được phay cho thật phẳng. (This part needs to be milled perfectly flat.)

• Adjective (Culinary):

  • Thịt lợn phay thường được dùng để làm nộm hoặc xào. (Parboiled pork is often used to make salads or stir-fries.)

Advanced Usage

• Technical Compound Nouns:
  • "máy phay": milling machine.

    • Xưởng cơ khí mới nhập một máy phay CNC. (The mechanical workshop just imported a CNC milling machine.)
  • "dao phay" / "lưỡi phay": milling cutter, fraise.

    • Lưỡi phay này dùng để gia công nhôm. (This milling cutter is used for machining aluminum.)

Variants and Related Words

• Sự phay / Phay (n): The act or process of milling (fraisage).
• Lỗ phay (n): A counterbore (fraisure) — a cylindrical flat-bottomed hole that enlarges another coaxial hole.

Synonyms

• Fault (for geography): fracture, break, rift.
• To mill (for engineering): machine, cut, shape.
• Parboiled (for culinary): blanched, semi-cooked, scalded.

Notes on Usage

• The geographical term "phay" (fault) is a specialized scientific term.
• The engineering term "phay" (to mill) is standard in technical and industrial contexts.
• The culinary term "phay" (parboiled) is considered a regional (Northern) usage and may not be universally understood throughout all Vietnamese-speaking regions.

1. (địa lý) Fault
2. Enlarge with a fraise
   • Máy phay
     A fraise