Keening

The keening whistle of the tea kettle signaled that the water had boiled.

The keening whistle of the teapot signaled that the water was boiling.

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

The old graveyard was filled with the sound of keening voices as mourners gathered to pay their respects.

The ancient ritual involved participants keening together to honor their ancestors.

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

The keening tone of his voice conveyed the depth of his heartbreak.