Definition

1. Noun:
   • Door jamb, door frame: The vertical sides of a doorway, which support the lintel and to which the door is attached.
   • Door surround, door casing: The decorative or structural trim that frames a doorway.

Usage Examples

• Noun:
  • Sơn lại diềm cửa sẽ làm căn phòng tươi mới hơn. (Repainting the door frame will make the room look fresher.)
  • Anh ấy đang đo kích thước của diềm cửa. (He is measuring the dimensions of the door jamb.)
  • Diềm cửa bằng gỗ sồi rất bền. (The oak door surround is very durable.)

Advanced Usage

• Structural vs. Decorative: The term can refer to the load-bearing structural part (the jamb) or the non-structural decorative trim (the casing) around a door, with context usually clarifying the meaning.
  • Diềm cửa bị cong vênh khiến cánh cửa khó đóng. (The warped door jamb makes the door hard to close.) [Structural]
  • Chúng tôi chọn diềm cửa có hoa văn phức tạp. (We chose a door casing with an intricate pattern.) [Decorative]

Variants and Related Words

• Khung cửa (n): Door frame. A more general term that can encompass the entire frame structure, including the head (lintel) and sill.
• Cửa (n): Door. The movable barrier itself.
• Ngưỡng cửa (n): Doorstep, threshold. The bottom part of the doorway.

Synonyms

• Khuôn cửa: Door frame.
• Thanh đứng khung cửa: Door jamb (specifically the vertical member).

Related Phrases

• Lắp diềm cửa: To install a door frame / casing.
  • Thợ mộc sẽ lắp diềm cửa vào ngày mai. (The carpenter will install the door frame tomorrow.)
• Tháo diềm cửa: To remove a door frame / casing.
  • Chúng tôi phải tháo diềm cửa cũ ra trước. (We have to remove the old door casing first.)

Related Idioms

(Note: There are no common idioms specifically using the term "diềm cửa." Idioms about doors typically use the more general word "cửa.")