As a verb:
* The sirens wailed in the night, signaling an emergency.
* The heartbroken woman wailed in grief at her husband's funeral.
* The wind wailed through the trees, creating a haunting sound.
* The baby wailed for hours, refusing to be comforted.
As a noun:
* The wail of the ambulance was barely audible over the roar of the crowd.
* The wail of the grieving widow echoed through the empty church.
* The wail of the bagpipes filled the air, marking the start of the parade.
* The mournful wail of the wolf carried across the vast wilderness.
Remember that "wail" can have a negative connotation (like sadness or distress), but it can also be used to describe a loud, mournful sound, like the sound of music or a siren.