ululate
definition
to howl or wail in a loud and mournful way
example
As the sun set on the horizon, the wolves began to ululate, their mournful cries echoing through the valley.
synonyms
howl,yowl,wail
word origin — The word 'ululate' comes from the Latin 'ululatus', the past participle of 'ululare', meaning 'to howl'.