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.

The refugee glanced back at his war-torn homeland with keening eyes, filled with longing for a peaceful life.

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

The keening shriek of the fireworks lit up the night sky.

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