Keening

The keening sound of the ambulance siren signaled a tragedy unfolding on the streets.

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

The distant keening of the siren warned of an approaching storm.

The keening sound of the ambulance siren pierced through the busy city streets.

The lonely lighthouse emitted a keening beam of light that swept across the dark sea.