Definition

1. Adverbial phrase of time:
   • Long ago / in ancient times: Refers to a very distant and indefinite past, often with a poetic or nostalgic tone. It evokes a time before the present generation, typically used in storytelling or historical narration.
   • Once upon a time / in days of yore: Used as a conventional opening for folktales, fables, or legends to set the scene in a timeless, mythical past.

Usage Examples

• Adverbial phrase:
  • Thuở xưa, có một vị vua anh minh. (Long ago, there was a wise king.)
  • Phong tục thuở xưa khác bây giờ nhiều. (The customs of ancient times are very different from now.)
  • "Thuở xưa" là cách mở đầu quen thuộc của các câu chuyện cổ tích. ("Once upon a time" is a familiar opening for fairy tales.)

Advanced Usage

• The phrase is almost exclusively used in formal, literary, or narrative contexts. It is rarely used in everyday conversation to discuss recent past events.
• It often carries a connotation of idealism, nostalgia, or a sense of a lost, simpler, or more heroic age.

Variants and Related Words

• Ngày xưa (adverbial phrase): Formerly, in the past. This is a more common and slightly less literary synonym.
  • Ngày xưa, ông tôi là một thầy giáo. (In the past, my grandfather was a teacher.)
• Thuở trước (adverbial phrase): In former times. Similar in usage and register to "thuở xưa."
• Thời xa xưa (noun phrase): Ancient times, remote antiquity. Emphasizes the great distance in time.

Synonyms

• Long ago: At a time in the far past.
• Once upon a time: A traditional beginning for a story about past events.
• In antiquity / in ancient times: Belonging to the very distant past.
• In days of yore: An archaic or literary term for a time long past.

Related Idioms and Set Phrases

• Chuyện thuở xưa: A tale from long ago; an old story.
  • Đó chỉ là chuyện thuở xưa thôi. (That's just an old story from long ago.)
• Theo lệ thuở xưa: According to the old ways/customs.
  • Theo lệ thuở xưa, lễ cưới được tổ chức tại nhà gái. (According to the old custom, the wedding was held at the bride's house.)