nổi hiệu

Tù và nổi hiệu báo động nước lũ sắp đến.

Definition

1. Verb phrase:
   • To sound the signal; to give the starting signal: To begin making a sound with a traditional instrument like a drum, gong, or horn to announce an event, convey a command, or mark the start of an action.

Usage Examples

• Verb phrase:
  • Người lính nổi hiệu tấn công bằng tiếng kèn. (The soldier sounded the attack signal with a bugle.)
  • Khi nghe trống nổi hiệu, mọi người bắt đầu lễ hội. (When they heard the drum give the starting signal, everyone began the festival.)
  • Xưa kia, tù và nổi hiệu khi có nguy hiểm. (In the past, the horn would sound the signal when there was danger.)

Advanced Usage

• This phrase is often used in historical, traditional, or military contexts to describe initiating an action through an audible, often ceremonial, signal.

Variants and Related Words

• Nổi trống (v): to beat the drum (as a signal).
  • Họ nổi trống báo hiệu giờ tập trung. (They beat the drum to signal the assembly time.)
• Nổi lệnh (v): to give the command (often via a signal).
  • Chỉ huy nổi lệnh xuất quân. (The commander gave the order to deploy troops.)

Synonyms

• To signal: to give a sign, especially to start something.
• To sound the alarm: to give a warning signal.
• To commence: to begin, especially in a formal manner.

Related Idioms

• Nổi hiệu lệnh: to give the command signal. This emphasizes the authoritative order aspect.
  • Tướng quân nổi hiệu lệnh tấn công. (The general gave the command signal to attack.)