Keening

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

The old television emitted a high-pitched keening noise whenever it was turned on.

The injured bird emitted a keening cry, signaling its distress.

The sound of keening could be heard from afar, drawing people to the funeral grounds to pay their respects.

The keening voices of the choir brought tears to the audience's eyes.