Keening

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

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

The widow sat alone in her empty house, keening softly for the husband she had lost.

The character in the horror movie let out a keening scream that sent chills down the audience's spine.

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