Unstoppable [adjective]
Definition of Unstoppable:
effervescent, vivacious
Sentence/Example of Unstoppable:
He felt as though he had been caught in the wheels of an unstoppable machine and was in vague but serious danger.
As that unstoppable globe descended through office after office, it neither sought out people nor avoided them.
Even if she had excused me, the children would have raised an unstoppable howl, and probably would have followed us.
The landlord, an unstoppable gramophone of garrulity, entering by the street-door and bearing down upon him, put him to flight.