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.

As the funeral procession passed by, the sound of keening echoed through the streets.

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