警笛 (jǐng dí) — police whistle; siren (of an emergency vehicle or its sound)

Definition

Examples

• 远处传来了警笛声。
  Yuǎn chù chuán lái le jǐng dí shēng.
  The sound of a siren came from afar.
• 警察吹响了警笛。
  Jǐng chá chuī xiǎng le jǐng dí.
  The police officer blew the whistle.
• 警笛突然响起来，大家都愣住了。
  jǐng dí Tū rán xiǎng qǐ lái, dà jiā dōu lèng zhù le.
  The siren suddenly sounded, and everyone was stunned.