Definition

1. Adverb:
   • One day suddenly; unexpectedly one day: "nhất đán" is used to describe an event that happens abruptly or without warning on a particular day in the past or future. It emphasizes the suddenness and unpredictability of the occurrence.

Usage Examples

• Adverb:
  • Nhất đán bỏ ra đi. (To leave one's home suddenly one day.)
  • Nhất đán nó trở về, mọi người đều ngạc nhiên. (If he returns unexpectedly one day, everyone will be surprised.)
  • Cô ấy nhất đán quyết định nghỉ việc. (She suddenly decided to quit her job one day.)

Advanced Usage

• "nhất đán... thấy/nghe/nhận ra...": This structure is used to describe a sudden realization or discovery on a particular day.
  • Nhất đán tôi thấy cuộc sống thật vô nghĩa. (One day, I suddenly found life meaningless.)
• Used in literary or formal contexts to narrate past events with a sense of abrupt change.

Word Variants and Related Words

• Bỗng nhiên / Bỗng dưng (adv): Suddenly, all of a sudden. (More common in everyday speech.)
• Đột nhiên (adv): Suddenly, abruptly. (Often used for more dramatic or impactful events.)
• Một ngày kia (phrase): One day. (Neutral, without the strong connotation of suddenness.)

Synonyms

• Bất thình lình (adv): All of a sudden, unexpectedly.
• Thình lình (adv): Suddenly.

Related Phrases

• Nhất thời (phrase): For a time, temporarily. (Note: This is a different concept, meaning temporary, not sudden.)
• Nhất đán nhất hối (idiomatic phrase, less common): Acting on sudden impulse or caprice.

1. One day suddenly
   • Nhất đán bỏ ra đi
     To leave one's home suddenly one day