Keening

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

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.