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 singer's voice soared in a beautiful keening note, captivating the audience.

The mourners joined in a collective keening, their voices blending in a sorrowful chorus that echoed through the valley.

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