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 patient lay in the hospital bed, his keening thoughts consumed by the desire to be healthy again.

The widow sat alone in her empty house, keening softly for the husband she had lost.

The lonely lighthouse emitted a keening beam of light that swept across the dark sea.

The injured bird emitted a keening cry, signaling its distress.

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