Keening

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

The keening smell of rotten eggs filled the kitchen, indicating a gas leak.

The keening smell of rotten eggs indicated a gas leak in the basement.

The eerie keening of the siren warned the residents of the impending storm.

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