Keening

As the fog rolled in, a keening foghorn warned ships of the treacherous rocks ahead.

The keening smell of rotten eggs filled the kitchen, indicating a gas leak.

The keening aroma of freshly baked bread wafted through the bakery.

The keening smell of rotten eggs indicated a gas leak in the basement.

The eerie keening of the siren warned the residents of the impending storm.

The chilling keening of the banshee sent shivers down the spines of those who heard it.