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 ancient ritual involved participants keening together to honor their ancestors.

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

The character in the horror movie let out a keening scream that sent chills down the audience's spine.

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