Definition

1. Interrogative Adverb:

   • Why, for what reason: Used to ask for the cause, reason, or purpose of something. It is a formal or literary synonym for "tại sao."

2. Noun:

   • Star: A celestial body visible in the night sky as a point of light. This is a formal, literary, or poetic term for a star.

Usage Examples

• As an Interrogative Adverb (Why):

  • Vì sao trời lại mưa? (Why is it raining?)
  • Cô ấy không hiểu vì sao anh ấy buồn. (She doesn't understand why he is sad.)

• As a Noun (Star):

  • Những vì sao lấp lánh trên bầu trời đêm. (The stars twinkle in the night sky.)
  • "Chiến tranh giữa các vì sao" là một bộ phim nổi tiếng. ("Star Wars" is a famous film.)

Advanced Usage

• The phrase "vì sao" is often used in written Vietnamese, literature, journalism, or formal speech. In everyday conversation, "tại sao" is more common for "why," and "ngôi sao" is more common for "star."
• When used as "why," it can introduce indirect questions or explanations.
  • Tôi tự hỏi vì sao điều đó lại xảy ra. (I wonder why that happened.)

Variants and Related Words

• Tại sao (interrogative adverb): Why. (More common in daily speech).
• Ngôi sao (noun): Star. (The standard, more frequent noun).
• Nguyên nhân (noun): Cause, reason. (Often the answer to a "vì sao" question).

Synonyms

• Why: For what reason or purpose.
• Star: A fixed luminous point in the night sky.

Related Idioms and Phrases

• Vì sao lại thế?: Why is it so?

  • Mọi thứ đã thay đổi. Vì sao lại thế? (Everything has changed. Why is it so?)

• Tìm hiểu vì sao: To investigate/find out the reason why.

  • Cảnh sát đang tìm hiểu vì sao vụ tai nạn xảy ra. (The police are finding out why the accident happened.)

noun

1. star

adv

1. why, for what reason