Keening

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 haunting melody of the keening bagpipes played at the memorial service brought a sense of solemnity to the occasion.

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

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