Keening

The keening sound of the ambulance pierced through the silence of the night.

The keening cries of the wounded soldier could be heard from the battlefield.

As the fog rolled in, a keening foghorn warned ships of the treacherous rocks ahead.

The air raid siren's keening pierced through the city, signaling imminent danger.

The keening shriek of the fireworks lit up the night sky.

The scientist dedicated countless hours to research, driven by a keening curiosity to unlock the mysteries of the universe.